summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/latex/mychemistry/mychemistry.sty
blob: 13aaeb8d82e721d02ca64bb9293fcd839b22ae6a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% ------------------------------------------------------------------------------------- %
% - myChemistry - mychemistry.sty ----------------------------------------------------- %
% - Creating reaction schemes with LaTeX and ChemFig ---------------------------------- %
% ------------------------------------------------------------------------------------- %
% - Clemens Niederberger -------------------------------------------------------------- %
% - 2011/03/20 ------------------------------------------------------------------------ %
% ------------------------------------------------------------------------------------- %
% - http://www.niederberger-berlin.net/2011/02/latex-mychemistry/ --------------------- %
% - kontakt@niederberger-berlin.net --------------------------------------------------- %
% ------------------------------------------------------------------------------------- %
% - If you have any ideas, questions, suggestions or bugs to report, please feel free - %
% - to contact me. -------------------------------------------------------------------- %
% ------------------------------------------------------------------------------------- %
% - Copyright 2011 Clemens Niederberger                                               - %
% -                                                                                   - %
% - This work may be distributed and/or modified under the                            - %
% - conditions of the LaTeX Project Public License, either version 1.3                - %
% - of this license or (at your option) any later version.                            - %
% - The latest version of this license is in                                          - %
% -   http://www.latex-project.org/lppl.txt                                           - %
% - and version 1.3 or later is part of all distributions of LaTeX                    - %
% - version 2005/12/01 or later.                                                      - %
% -                                                                                   - %
% - This work has the LPPL maintenance status `maintained'.                           - %
% -                                                                                   - %
% - The Current Maintainer of this work is Clemens Niederberger.                      - %
% -                                                                                   - %
% - This work consists of the files mychemistry.sty, mychemistry_de.tex and           - %
% - mychemistry_en.tex                                                                - %
% ------------------------------------------------------------------------------------- %
% - 2011/02/24 version 1.0                                                            - %
% ------------------------------------------------------------------------------------- %
% - 2011/03/01 version 1.1                                                            - %
% -   package option `english' added                                                  - %
% -   package key `placement' added                                                   - %
% -   rxnscheme key `placement' added                                                 - %
% -   package key `shade=boolean' changed into package option `shade'                 - %
% -   package option `nochemexec' added, will prevent mC from loading chemexec        - %
% - 2011/03/20 version 1.2                                                            - %
% -   license changed into LPPL 1.3 or later                                          - %
% -   package option `nocompounds' added, will prevent mC from loading chemcompounds  - %
% -   package option `chemstyle' added, will load chemstyle                           - %
% -   package option `nomhchem' added, will prevent mC from loading mhchem            - %
% -     if chemexec isn't loaded either                                               - %
% -   package option `nopackages' added, will prevent mC from loading any             - %
% -     chemistry package except chemfig                                              - %
% -   some small issues resolved                                                      - %
% -   bug in arrow type <=> resolved                                                  - %
% -   arrow argument placement rewritten; two new keys for arrow: `aboveshift'        - %
% -     and `belowshift' (causing new problems with alignment, though)                - %
% -   wrong arrow alignment (due to last change) mainly resolved (NEEDS pgf v2.10!)   - %
% -     => solved wrong branch alignment as well                                      - %
% -   `inner sep' set to 0, arrow, transition & mesomeric adjusted                    - %
% -   bug in arrow type -|> resolved                                                  - %
% -   commands \makevisible / \makeinvisible added                                    - %
% -   arrow key `both' added                                                          - %
% -   rxn has now keys instead of an option                                           - %
% -   commands \setrcndist, \setrxnalign, \setschemealign added                       - %
% -   rxn-, rxnscheme-key align added                                                 - % 
% ------------------------------------------------------------------------------------- %
% - TODO                                                                              - %
% -   make the arrow type {-|>} look nicer                                            - %
% -   work on how chemistry-packages are automatically loaded;                        - %
% -     add ui for easy handling this issue? (via \mCsetup ?)                         - %
% -   add rotate=<winkel> for diagonal arrows?                                        - %
% -   add \mCdefault or sim. to restore all default settings?                         - %
% ------------------------------------------------------------------------------------- %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\def\@mc@version{v1.2}
\def\@mc@date@de{20. M\"arz 2011}
\def\@mc@date@en{March 20th 2011}
\ProvidesPackage{mychemistry}[2011/03/20]
\typeout{myChemistry \@mc@version}
\typeout{2011/03/20 Clemens Niederberger}
\typeout{}
\RequirePackage{ifthen,calc,float}
\RequirePackage{xkeyval}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Optionen, z.T. auch an chemexec weitergeben
\newcommand{\@mc@exec@color}{black}
\newcommand{\@mc@exec@shade}{false}
\newif\if@usecolor\@usecolorfalse
% wenn key color, dann Farbe und Option shade=true an chemexec weitergeben
\define@key[MC]{mychemistry.sty}%
  {color}{
    \@usecolortrue
    \renewcommand{\@mc@exec@color}{#1}
    \renewcommand{\@mc@exec@shade}{true}
  }
% sonst nicht:
\DeclareOptionX[MC]{nocolor}{
  \@usecolortrue
  \renewcommand{\@mc@exec@color}{black}
  \renewcommand{\@mc@exec@shade}{false}
}
% shade separat (de-)aktivieren
\DeclareOptionX[MC]{shade}{%
  \renewcommand{\@mc@exec@shade}{true}
}
% chemexec abschalten
\newcommand{\@mc@exec@true}{true}
\DeclareOptionX[MC]{nochemexec}{%
  \renewcommand{\@mc@exec@true}{false}
}
% mhchem abschalten
\newcommand{\@mc@mhchem@true}{true}
\DeclareOptionX[MC]{nomhchem}{%
  \renewcommand{\@mc@mhchem@true}{false}
}
% chemcompounds abschalten
\newcommand{\@mc@compound@true}{true}
\DeclareOptionX[MC]{nocompounds}{%
  \renewcommand{\@mc@compound@true}{false}
}
% chemstyle einschalten
\newcommand{\@mc@chemstyle@true}{false}
\DeclareOptionX[MC]{chemstyle}{%
  \renewcommand{\@mc@chemstyle@true}{true}
}
% nur `chemfig' laden
\DeclareOptionX[MC]{nopackages}{%
  \renewcommand{\@mc@exec@true}{false}
  \renewcommand{\@mc@mhchem@true}{false}
  \renewcommand{\@mc@compound@true}{false}
  \renewcommand{\@mc@chemstyle@true}{false}
}
% englische Version von chemexec, englische Variante von myChemistry
\newcommand{\@mc@exec@english}{}
\newcommand{\@mc@rs@name}{Reaktionsschema}
\DeclareOptionX[MC]{english}{
  \renewcommand{\@mc@exec@english}{,english}
  \renewcommand{\@mc@rs@name}{Reaction scheme}
}
\newcommand{\@mc@rs@placement}{H}
\newcommand{\@mc@rs@currentplacement}{\@mc@rs@placement}
\define@key[MC]{mychemistry.sty}{placement}{
  \renewcommand{\@mc@rs@placement}{#1}
}
\ProcessOptionsX[MC]
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% chemstyle laden, falls verfügbar und Option aktiv
\IfFileExists{chemstyle.sty}{%
  \ifthenelse{\equal{\@mc@chemstyle@true}{true}}{
    \@ifpackageloaded{chemstyle}{}{
      \RequirePackage[varioref=false,floats=float]{chemstyle}
      \PackageInfo{mychemistry}{You loaded `chemstyle' with options `varioref=false' and `floats=float'. Please be aware, that you might need to restyle the float `table'. Take a look at the `chemstyle' documentation for further information.}
    }
  }{}
}{}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% chemcompounds laden, falls verfügbar
\IfFileExists{chemcompounds.sty}{%
  \ifthenelse{\equal{\@mc@compound@true}{true}}{
    \@ifpackageloaded{chemcompounds}{}{
      \RequirePackage{chemcompounds}
    }
  }{}
}{
  \typeout{`chemcompounds' is not installed.}
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% chemfig laden, falls verfügbar
\IfFileExists{chemfig.sty}{%
  \@ifpackageloaded{chemfig}{}{
    \RequirePackage{chemfig}
  }
  \usetikzlibrary{arrows,positioning,decorations.pathmorphing,shapes,calc,matrix,chains,scopes}
}{% sonst Fehlermeldung
  \PackageError{mychemistry}{`ChemFig' is not installed! `mychemistry' can't work without it!}
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% chemexec laden, falls verfügbar, falls nicht, dann wenigstens mhchem laden
\IfFileExists{chemexec.sty}{% mit den Default-Optionen color=black, shade=false,exercise,exersize=large
  \ifthenelse{\equal{\@mc@exec@true}{true}}{
    \ifthenelse{\equal{\@mc@mhchem@true}{true}}{}{
      \PackageWarning{mychemistry}{You used the option `nomhchem' but not `nochemexec'. Please be aware that `mhchem' is loaded by `chemexec' anyway.}
    }
    \@ifpackageloaded{chemexec}{}{
      \RequirePackage[color=\@mc@exec@color,shade=\@mc@exec@shade,exercise,exersize=large\@mc@exec@english]{chemexec}
    }
  }{}
}{
  \typeout{`chemexec' ist not installed.}
  \IfFileExists{mhchem.sty}{
    \ifthenelse{\equal{\@mc@mhchem@true}{true}}{
      \@ifpackageloaded{mhchem}{}{
        \RequirePackage[version=3]{mhchem}
      }
    }{}
  }{
    \typeout{`mhchem' ist not installed.}
  }
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% NEUE BEFEHLE:                                                                         %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\providecommand{\mCversion}{\@mc@version}
\providecommand{\mCdate}[1]{
  \ifthenelse{\equal{#1}{de}}{\@mc@date@de}{}
  \ifthenelse{\equal{#1}{en}}{\@mc@date@en}{}
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% PFEILE ------------------------------------------------------------------------------ %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% interne Befehle, Voreinstellungen --------------------------------------------------- %
\newcommand{\@arrow@above}{above}                % oben
\newcommand{\@arrow@currentabove}{\@arrow@above} %
\newcommand{\@arrow@below}{below}                % unten
\newcommand{\@arrow@currentbelow}{\@arrow@below} %
\newcommand{\@arrow@direction}{right}            % Richtung
\newcommand{\@arrow@currentdirection}{\@arrow@direction}
\newcommand{\@arrow@currentlength}{\@arrow@length}
\newlength{\@arrow@length@actual}
\newcommand{\@arrow@rotate}{}
\newcommand{\@arrow@argument@angle}{}
\newcommand{\@arrow@argument@shift}{2pt}
\newcommand{\@arrow@argument@anchor}{}
\newcommand{\@arrow@argument@both}{}
%\newcommand{\@arrow@argument@size}{}
\newcommand{\@arrow@above@anchor}{}
\newcommand{\@arrow@below@anchor}{}
\newcommand{\@arrow@type}{->}                    % Pfeiltyp
\newcommand{\@arrow@currenttype}{\@arrow@type}   %
\newcommand{\@arrow@start@up}{0,0.05}            % Verschiebung für Glgw-Pfeil
\newcommand{\@arrow@start@down}{0,-0.05}         %
\newcommand{\@arrow@placement}{on chain=going \@arrow@currentdirection} % wohin?
\newcommand{\@arrow@currentplacement}{\@arrow@placement}
\newcommand{\@arrow@cross@base@x}{}              % Befehle für durchgestrichenen Pfeil
\newcommand{\@arrow@cross@base@y}{}              %
\newcommand{\@arrow@cross@angle}{}               %
\newcommand{\@arrow@cross@length}{}              %
\newcommand{\@arrow@cross@draw}{}                %

% Laengenfaktor ----------------------------------------------------------------------- %
\newcommand{\@arrow@length}{1.0}                 % Längenfaktor
\newcommand{\@arrow@length@factor}{1.0}          % Default-Faktor
\newcommand{\@arrow@end}{\@arrow@length@actual,0} % Pfeilende
\define@key{arrow}{length}[\@arrow@length]{%     %
    \renewcommand{\@arrow@currentlength}{#1}}%   %
\newlength{\@arrow@length@default}               %
\setlength{\@arrow@length@default}{5em}          % Default-Laenge
\newcommand{\arrowlength}[1]{\setlength{\@arrow@length@default}{#1}}

% Beschriftungen ---------------------------------------------------------------------- %
\newlength{\@arrow@argument@aboveshift}           % Verschieben der Beschriftung
\newlength{\@arrow@argument@belowshift}           % Verschieben der Beschriftung
\define@key{arrow}{aboveshift}[2pt]{%
  \setlength{\@arrow@argument@aboveshift}{#1}}
\define@key{arrow}{belowshift}[2pt]{%
  \setlength{\@arrow@argument@belowshift}{#1}}
\define@key{arrow}{both}[]{
  \renewcommand{\@arrow@argument@both}{true}
}

% Anker ------------------------------------------------------------------------------- %
\newcommand{\@arrow@name}{}                      % Anker
\newcommand{\@arrow@currentname}{\@arrow@name}   %
\define@key{arrow}{name}[\@arrow@name]{%         %
    \renewcommand{\@arrow@currentname}{#1}}%     %

% Richtung ---------------------------------------------------------------------------- %
\define@key{arrow}{direction}[\@arrow@direction]{%
    \renewcommand{\@arrow@currentdirection}{#1}  %
    \ifthenelse{\equal{#1}{right}}{% nach rechts, Einstellungen:
     \renewcommand{\@arrow@end}{\@arrow@length@actual,0}
     \renewcommand{\@arrow@currentabove}{above}
     \renewcommand{\@arrow@currentbelow}{below}
     \renewcommand{\@arrow@above@anchor}{south}
     \renewcommand{\@arrow@below@anchor}{north}
     \renewcommand{\@arrow@argument@anchor}{
       \node(@arrow@center) at ($(\tikzchainprevious.east)+(.5\@arrow@length@actual+\@rxn@node@distance,0)$) {};
     }
     \renewcommand{\@arrow@argument@angle}{0}
     \renewcommand{\@arrow@rotate}{0}
     \renewcommand{\@arrow@start@up}{0,0.03}
     \renewcommand{\@arrow@start@down}{0,-0.03}
     \renewcommand{\@arrow@cross@base@x}{.15em}
     \renewcommand{\@arrow@cross@base@y}{0}
     \renewcommand{\@arrow@cross@angle}{60}
     \renewcommand{\@arrow@cross@length}{.5em}
    }{
     \ifthenelse{\equal{#1}{above right}}{% nach oben rechts, Einstellungen:
      \renewcommand{\@arrow@end}{\@arrow@length@actual,\@arrow@length@actual}
      \renewcommand{\@arrow@currentabove}{above left}
      \renewcommand{\@arrow@currentbelow}{below right}
      \renewcommand{\@arrow@above@anchor}{south}
      \renewcommand{\@arrow@below@anchor}{north}
      \renewcommand{\@arrow@argument@anchor}{
        \node(@arrow@center) at ($(\tikzchainprevious.north east)+(.5\@arrow@length@actual+.707\@rxn@node@distance,.5\@arrow@length@actual+.707\@rxn@node@distance)$) {};
      }
      \renewcommand{\@arrow@argument@angle}{45}
      \renewcommand{\@arrow@rotate}{45}
      \renewcommand{\@arrow@start@up}{-0.02,0.02}
      \renewcommand{\@arrow@start@down}{0.02,-0.02}
      \renewcommand{\@arrow@cross@base@x}{.1em}
      \renewcommand{\@arrow@cross@base@y}{.1em}
      \renewcommand{\@arrow@cross@angle}{-15}
      \renewcommand{\@arrow@cross@length}{.7em}
     }{
     \ifthenelse{\equal{#1}{above}}{% nach oben, Einstellungen:
      \renewcommand{\@arrow@end}{0,\@arrow@length@actual}
      \renewcommand{\@arrow@currentabove}{left}
      \renewcommand{\@arrow@currentbelow}{right}
      \renewcommand{\@arrow@above@anchor}{east}
      \renewcommand{\@arrow@below@anchor}{west}
      \renewcommand{\@arrow@argument@anchor}{
       \node(@arrow@center) at ($(\tikzchainprevious.north)+(0,.5\@arrow@length@actual+\@rxn@node@distance)$) {};
      }
      \renewcommand{\@arrow@argument@angle}{90}
      \renewcommand{\@arrow@rotate}{0}
      \renewcommand{\@arrow@start@up}{-0.03,0}
      \renewcommand{\@arrow@start@down}{0.03,0}
      \renewcommand{\@arrow@cross@base@x}{0}
      \renewcommand{\@arrow@cross@base@y}{.15em}
      \renewcommand{\@arrow@cross@angle}{30}
      \renewcommand{\@arrow@cross@length}{.5em}
      }{
       \ifthenelse{\equal{#1}{above left}}{% nach oben links, Einstellungen:
        \renewcommand{\@arrow@end}{-\@arrow@length@actual,\@arrow@length@actual}
        \renewcommand{\@arrow@currentabove}{above right}
        \renewcommand{\@arrow@currentbelow}{below left}
        \renewcommand{\@arrow@above@anchor}{south}
        \renewcommand{\@arrow@below@anchor}{north}
        \renewcommand{\@arrow@argument@anchor}{
          \node(@arrow@center) at ($(\tikzchainprevious.north west)+(-.5\@arrow@length@actual-.707\@rxn@node@distance,.5\@arrow@length@actual+.707\@rxn@node@distance)$) {};
        }
        \renewcommand{\@arrow@argument@angle}{-45}
        \renewcommand{\@arrow@rotate}{-45}
        \renewcommand{\@arrow@start@up}{-0.02,-0.02}
        \renewcommand{\@arrow@start@down}{0.02,0.02}
        \renewcommand{\@arrow@cross@base@x}{-.1em}
        \renewcommand{\@arrow@cross@base@y}{.1em}
        \renewcommand{\@arrow@cross@angle}{15}
        \renewcommand{\@arrow@cross@length}{.7em}
       }{
       \ifthenelse{\equal{#1}{left}}{% nach links, Einstellungen:
        \renewcommand{\@arrow@end}{-\@arrow@length@actual,0}
        \renewcommand{\@arrow@currentabove}{above}
        \renewcommand{\@arrow@currentbelow}{below}
        \renewcommand{\@arrow@above@anchor}{south}
        \renewcommand{\@arrow@below@anchor}{north}
        \renewcommand{\@arrow@argument@anchor}{
          \node(@arrow@center) at ($(\tikzchainprevious.west)+(-.5\@arrow@length@actual-\@rxn@node@distance,0)$) {};
        }
        \renewcommand{\@arrow@argument@angle}{0}
        \renewcommand{\@arrow@rotate}{0}
        \renewcommand{\@arrow@start@up}{0,-0.03}
        \renewcommand{\@arrow@start@down}{0,0.03}
        \renewcommand{\@arrow@cross@base@x}{.15em}
        \renewcommand{\@arrow@cross@base@y}{0}
        \renewcommand{\@arrow@cross@angle}{60}
        \renewcommand{\@arrow@cross@length}{.5em}
       }{
        \ifthenelse{\equal{#1}{below left}}{% nach unten links, Einstellungen:
         \renewcommand{\@arrow@end}{-\@arrow@length@actual,-\@arrow@length@actual}
         \renewcommand{\@arrow@currentabove}{above left}
         \renewcommand{\@arrow@currentbelow}{below right}
         \renewcommand{\@arrow@above@anchor}{south}
         \renewcommand{\@arrow@below@anchor}{north}
         \renewcommand{\@arrow@argument@anchor}{
           \node(@arrow@center) at ($(\tikzchainprevious.south west)+(-.5\@arrow@length@actual-.707\@rxn@node@distance,-.5\@arrow@length@actual-.707\@rxn@node@distance)$) {};
         }
         \renewcommand{\@arrow@argument@angle}{45}
         \renewcommand{\@arrow@rotate}{45}
         \renewcommand{\@arrow@start@up}{0.02,-0.02}
         \renewcommand{\@arrow@start@down}{-0.02,0.02}
         \renewcommand{\@arrow@cross@base@x}{.1em}
         \renewcommand{\@arrow@cross@base@y}{.1em}
         \renewcommand{\@arrow@cross@angle}{-15}
         \renewcommand{\@arrow@cross@length}{.7em}
        }{
         \ifthenelse{\equal{#1}{below}}{% nach unten, Einstellungen:
          \renewcommand{\@arrow@end}{0,-\@arrow@length@actual}
          \renewcommand{\@arrow@currentabove}{left}
          \renewcommand{\@arrow@currentbelow}{right}
          \renewcommand{\@arrow@above@anchor}{east}
          \renewcommand{\@arrow@below@anchor}{west}
          \renewcommand{\@arrow@argument@anchor}{
            \node(@arrow@center) at ($(\tikzchainprevious.south)+(0,-.5\@arrow@length@actual-\@rxn@node@distance)$) {};
          }
          \renewcommand{\@arrow@argument@angle}{90}
          \renewcommand{\@arrow@rotate}{0}
          \renewcommand{\@arrow@start@up}{0.03,0}
          \renewcommand{\@arrow@start@down}{-0.03,0}
          \renewcommand{\@arrow@cross@base@x}{0}
          \renewcommand{\@arrow@cross@base@y}{.15em}
          \renewcommand{\@arrow@cross@angle}{30}
          \renewcommand{\@arrow@cross@length}{.5em}
         }{
          \ifthenelse{\equal{#1}{below right}}{% nach unten rechts, Einstellungen:
           \renewcommand{\@arrow@end}{\@arrow@length@actual,-\@arrow@length@actual}
           \renewcommand{\@arrow@currentabove}{above right}
           \renewcommand{\@arrow@currentbelow}{below left}
           \renewcommand{\@arrow@above@anchor}{south}
           \renewcommand{\@arrow@below@anchor}{north}
           \renewcommand{\@arrow@argument@anchor}{
             \node(@arrow@center) at ($(\tikzchainprevious.south east)+(.5\@arrow@length@actual+.707\@rxn@node@distance,-.5\@arrow@length@actual-.707\@rxn@node@distance)$) {};
           }
           \renewcommand{\@arrow@argument@angle}{-45}
           \renewcommand{\@arrow@rotate}{-45}
           \renewcommand{\@arrow@start@up}{0.02,0.02}
           \renewcommand{\@arrow@start@down}{-0.02,-0.02}
           \renewcommand{\@arrow@cross@base@x}{-.1em}
           \renewcommand{\@arrow@cross@base@y}{.1em}
           \renewcommand{\@arrow@cross@angle}{15}
           \renewcommand{\@arrow@cross@length}{.7em}
          }{
           \PackageError{mychemistry}{Unknown arrow direction}% oder Fehler
          }
         }
        }
       }
      }
     }
    }
   }
}

% Pfeiltyp ---------------------------------------------------------------------------- %
\newcommand{\@arrow@drawing}{}
\define@key{arrow}{type}[\@arrow@type]{%
  \renewcommand{\@arrow@currenttype}{#1}
  \ifthenelse{\equal{#1}{->}}{
  \renewcommand{\@arrow@drawing}{\draw[->,thick,text height=0] (0,0) -- node[pos=.5](@arrow@center){} ++(\@arrow@end);}
  }{
    \ifthenelse{\equal{#1}{<->}}{
    \renewcommand{\@arrow@drawing}{\draw[<->,thick,text height=0] (0,0) -- node[pos=.5](@arrow@center){} ++(\@arrow@end);}
    }{
      \ifthenelse{\equal{#1}{<-}}{
      \renewcommand{\@arrow@drawing}{\draw[<-,thick,text height=0] (0,0) -- node[pos=.5](@arrow@center){} ++(\@arrow@end);}
      }{
        \ifthenelse{\equal{#1}{<=>}}{
        \renewcommand{\@arrow@drawing}{\draw[-left to,thick,text height=0] (\@arrow@start@up) -- ++(\@arrow@end);\draw[left to-,thick,text height=0] (\@arrow@start@down) -- ++(\@arrow@end);\draw[draw=none] (0,0) -- node[pos=.5](@arrow@center){} ++(\@arrow@end);}
        }{
          \ifthenelse{\equal{#1}{-|>}}{
           \setlength{\@arrow@argument@aboveshift}{.75em}
           \setlength{\@arrow@argument@belowshift}{.75em}
           \renewcommand{\@arrow@cross@draw}{\draw[thick] ($(@arrow@center.base) + (\@arrow@cross@base@x,\@arrow@cross@base@y) + (\@arrow@cross@angle:\@arrow@cross@length)$) -- ($(@arrow@center.base) + (\@arrow@cross@base@x,\@arrow@cross@base@y) + (\@arrow@cross@angle-180:\@arrow@cross@length)$);\draw[thick] ($(@arrow@center.base) + (-\@arrow@cross@base@x,-\@arrow@cross@base@y) + (\@arrow@cross@angle:\@arrow@cross@length)$) -- ($(@arrow@center.base) + (-\@arrow@cross@base@x,-\@arrow@cross@base@y) + (\@arrow@cross@angle-180:\@arrow@cross@length)$);}
           \renewcommand{\@arrow@drawing}{\draw[->,thick,text height=0] (0,0) -- node[pos=.5](@arrow@center){} ++(\@arrow@end);\@arrow@cross@draw}
          }{
           \PackageError{mychemistry}{Unknown arrow type}% oder Fehler
          }
        }
      }
    }
  }
}%
% ------------------------------------------------------------------------------------- %
% Maße der Nodes der Pfeilargumente bestimmen, größere später an Pfeil weitergeben
\newlength{\@mc@height@A}
\newlength{\@mc@height@B}
\newlength{\@arrow@argument@height}
\newlength{\@mc@width@A}
\newlength{\@mc@width@B}
\newlength{\@arrow@argument@width}
\newcommand{\@mc@savenode}{%
    \global\let\@mc@minx=\pgfpositionnodelaterminx%
    \global\let\@mc@maxx=\pgfpositionnodelatermaxx%
    \global\let\@mc@miny=\pgfpositionnodelaterminy%
    \global\let\@mc@maxy=\pgfpositionnodelatermaxy%
}%
% der nächste Befehl benötigt pgf v2.10!
\newcommand{\@mc@largernode}[2]{
  \@ifundefined{pgfpositionnodelater}{
    \PackageError{mychemistry}{The command \string\pgfpositionnodelater is undefined. Make sure, you have installed the latest version of pgf.}
  }{}
  {\pgfpositionnodelater{\@mc@savenode}
  \node{#1};
  \setlength{\@mc@width@A}{\@mc@maxx}%
  \addtolength{\@mc@width@A}{-\@mc@minx}
  \setlength{\@mc@height@A}{\@mc@maxy}%
  \addtolength{\@mc@height@A}{-\@mc@miny}
  \node{#2};
  \setlength{\@mc@width@B}{\@mc@maxx}%
  \addtolength{\@mc@width@B}{-\@mc@minx}
  \setlength{\@mc@height@B}{\@mc@maxy}%
  \addtolength{\@mc@height@B}{-\@mc@miny}
  \pgfmathsetlength{\@arrow@argument@width}{max(\@mc@width@A,\@mc@width@B)}
  \pgfmathsetlength{\@arrow@argument@height}{max(\@mc@height@A,\@mc@height@B)}
  \global\@arrow@argument@width=\@arrow@argument@width
  \global\@arrow@argument@height=\@arrow@argument@height
  }
}

% Pfeil zeichnen ---------------------------------------------------------------------- %
\newcommand{\@arrow}[3][]{
 \renewcommand{\@arrow@length@factor}{\@arrow@currentlength}
 \setlength{\@arrow@length@actual}{\@arrow@currentlength\@arrow@length@default}
 \ifthenelse{\equal{\@arrow@argument@both}{true}}{
   \@mc@largernode{#2}{#3}
 }{
   \setlength{\@arrow@argument@width}{0pt}
   \setlength{\@arrow@argument@height}{0pt}
 }
 \draw node[on chain=going \@arrow@currentdirection](\@arrow@currentname) {\tikz{
   \@arrow@drawing
   }
 };
 \@arrow@argument@anchor
 \draw node[anchor=\@arrow@above@anchor,rotate=\@arrow@rotate,minimum width=\@arrow@argument@width, minimum height=\@arrow@argument@height]
  at ($(@arrow@center.base)+(90+\@arrow@argument@angle:\@arrow@argument@aboveshift)$) {#2};
 \draw node[anchor=\@arrow@below@anchor,rotate=\@arrow@rotate,minimum width=\@arrow@argument@width, minimum height=\@arrow@argument@height]
  at ($(@arrow@center.base)+(-90+\@arrow@argument@angle:\@arrow@argument@belowshift)$) {#3};
 \setlength{\@arrow@argument@aboveshift}{2pt}
 \setlength{\@arrow@argument@belowshift}{2pt}
}

% Voreinstellungen:
\presetkeys%
  {arrow}
  {direction=\@arrow@direction,length=\@arrow@length,type=\@arrow@type,aboveshift=\@arrow@argument@shift,belowshift=\@arrow@argument@shift}
  {}

% Eigentlicher Befehl:
\providecommand{\arrow}[3][]{
 \setkeys{arrow}{#1}
 \@arrow{#2}{#3}
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% MERGE ------------------------------------------------------------------------------- %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newcommand{\@merge@direction}{below}
\newcommand{\@merge@to}{}
\newcommand{\@merge@from@one}{}
\newcommand{\@merge@from@two}{}
\newcommand{\@merge}[3]{
  \renewcommand{\@merge@to}{#1}
  \renewcommand{\@merge@from@one}{#2}
  \renewcommand{\@merge@from@two}{#3}
}
% Basisbefehle ------------------------------------------------------------------------ %
\newcommand{\@merge@right}{
 \draw[stealth-,thick] ($(\@merge@to.west)+(-1em,0)$) -- ($(\@merge@to.west)+(-4em,0)$) node(crossing) {};
 \draw[thick] ($(\@merge@from@one.east)+(1em,0)$) -| (crossing.base);
 \draw[thick] ($(\@merge@from@two.east)+(1em,0)$) -| (crossing.base);
}
\newcommand{\@merge@above}{
 \draw[stealth-,thick] ($(\@merge@to.south)+(0,-1em)$) -- ($(\@merge@to.south)+(0,-4em)$) node(crossing) {};
 \draw[thick] (crossing.base) -| ($(\@merge@from@one.north)+(0,1em)$);
 \draw[thick] (crossing.base) -| ($(\@merge@from@two.north)+(0,1em)$);
}
\newcommand{\@merge@left}{
 \draw[stealth-,thick] ($(\@merge@to.east)+(1em,0)$) -- ($(\@merge@to.east)+(4em,0)$) node(crossing) {};
 \draw[thick] ($(\@merge@from@one.west)+(-1em,0)$) -| (crossing.base);
 \draw[thick] ($(\@merge@from@two.west)+(-1em,0)$) -| (crossing.base);;
}
\newcommand{\@merge@below}[3]{
 \draw[stealth-,thick] ($(\@merge@to.north)+(0,1em)$) -- ($(\@merge@to.north)+(0,4em)$) node(crossing) {};
 \draw[thick] (crossing.base) -| ($(\@merge@from@one.south)+(0,-1em)$);
 \draw[thick] (crossing.base) -| ($(\@merge@from@two.south)+(0,-1em)$);
}
% key zur Auswahl --------------------------------------------------------------------- %
\define@choicekey{merge}{direction}[\val\nr]{right,above,left,below}[below]{
  \ifcase\nr\relax
    \@merge@right
  \or
    \@merge@above
  \or
    \@merge@left
  \or
    \@merge@below
  \fi
}
% Voreinstellung ---------------------------------------------------------------------- %
\presetkeys%
  {merge}
  {direction=below}
  {}
% eigentlicher Befehl ----------------------------------------------------------------- %
\newcommand{\merge}[4][]{
  \@merge{#2}{#3}{#4}
  \setkeys{merge}{#1}
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% REAKTIONSSCHEMA --------------------------------------------------------------------- %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newlength{\@rxn@node@distance}
\setlength{\@rxn@node@distance}{1em}
\providecommand{\setrcndist}[1]{
  \ifthenelse{\equal{#1}{}}{
    \setlength{\@rxn@node@distance}{1em}
  }{
    \setlength{\@rxn@node@distance}{#1}
  }
}
% ------------------------------------------------------------------------------------- %
% Schema ------------------------------------------------------------------------------ %
% ------------------------------------------------------------------------------------- %
\newcommand{\@mc@rs@scale}{1.0}                  % Default-Skalierung
\newcommand{\@mc@rs@currentscale}{\@mc@rs@scale} %
\providecommand{\setschemename}[1]{\renewcommand{\@mc@rs@name}{#1}}
\newcommand{\@mc@rs@caption}{}                   % Beschriftung
\newcommand{\@mc@rs@label}{}                     % Label
\newcommand{\@mc@rs@currentlabel}{\@mc@rs@label} %
\define@key{rxnscheme}{label}{%                  %
  \ifthenelse{\equal{#1}{}}{}{                   %
    \renewcommand{\@mc@rs@currentlabel}{#1}      %
  }                                              %
}                                                %
\define@key{rxnscheme}{scale}[1.0]{              % Skalierung
  \renewcommand{\@mc@rs@currentscale}{#1}        %
}                                                %
\define@key{rxnscheme}{name}{                    % Name
  \renewcommand{\@mc@rs@name}{#1}                %
}                                                %
\define@key{rxnscheme}{placement}{               % Float-Platzierung
  \renewcommand{\@mc@rs@currentplacement}{#1}    %
}                                                %
\newcommand{\@mc@rs@align}{center}               %
\newcommand{\@mc@rs@right}{right}                %
\newcommand{\@mc@rs@center}{center}              %
\newcommand{\@mc@rs@left}{left}                  %
\providecommand{\setschemealign}[1]{             %
  \ifthenelse{\equal{#1}{}}{                     %
    \renewcommand{\@mc@rs@align}{center}         %
  }{                                             %
    \renewcommand{\@mc@rs@align}{#1}             %
  }                                              %
}                                                %
\define@key{rxnscheme}{align}{                   % Alignment
  \renewcommand{\@mc@rs@align}{#1}
}
% Voreinstellungen:
%\presetkeys%
%  {rxnscheme}
%  {scale=\@mc@rs@scale,align=\@mc@rs@align,label=\@mc@rs@label}
%  {}
% Gleitumgebung
\floatstyle{ruled}
\newfloat{rxnfloat}{\@mc@rs@currentplacement}{rxnscheme}
\floatname{rxnfloat}{\@mc@rs@name}               % Name ändern
% eigentliche Umgebung:
\newenvironment{rxnscheme}[2][]{%
  \setkeys{rxnscheme}{#1}
  \renewcommand\@mc@rs@caption{#2}
  \begin{rxnfloat}
  %\centering
  \ifx\@mc@rs@align\@mc@rs@center \centering \fi
  \ifx\@mc@rs@align\@mc@rs@left \raggedright \fi
  \ifx\@mc@rs@align\@mc@rs@right \raggedleft \fi
  \@mc@atomsize\@mc@bondlength\@mc@bondshape
  \begin{tikzpicture}[every picture/.style={scale=\@mc@rs@currentscale},start chain,node distance=\@rxn@node@distance,inner sep=0pt]
}{%
  \end{tikzpicture}%
  \caption{\@mc@rs@caption}
  \ifthenelse{\equal{\@mc@rs@currentlabel}{}}{}{\label{\@mc@rs@currentlabel}}
  \end{rxnfloat}
}

% ------------------------------------------------------------------------------------- %
% einfache Reaktion ------------------------------------------------------------------- %
% ------------------------------------------------------------------------------------- %
\newcommand{\@mc@reaction@scale}{1.0}
\newcommand{\@mc@reaction@align}{center}
\providecommand{\setrxnalign}[1]{
  \ifthenelse{\equal{#1}{}}{
    \renewcommand{\@mc@reaction@align}{center}
  }{
    \renewcommand{\@mc@reaction@align}{#1}
  }
}
\newcommand{\@mc@reaction@right}{right}
\newcommand{\@mc@reaction@center}{center}
\newcommand{\@mc@reaction@left}{left}
\define@key{rxn}{scale}{
  \renewcommand{\@mc@reaction@scale}{#1}}
\define@key{rxn}{align}{
  \renewcommand{\@mc@reaction@align}{#1}}
% Voreinstellungen:
%\presetkeys%
%  {rxn}
%  {scale=\@mc@reaction@scale,align=\@mc@reaction@align}
%  {}
\newenvironment{rxn}[1][]{%
  \setkeys{rxn}{#1}
  \ifx\@mc@reaction@align\@mc@reaction@center
  \begin{center}
  \fi
  \ifx\@mc@reaction@align\@mc@reaction@left
  \begin{flushleft}
  \fi
  \ifx\@mc@reaction@align\@mc@reaction@right
  \begin{flushright}
  \fi
  \@mc@bondlength\@mc@bondshape\@mc@atomsize
  \begin{tikzpicture}[every picture/.style={scale=\@mc@reaction@scale},start chain,node distance=\@rxn@node@distance,inner sep=0pt]
}{%
  \end{tikzpicture}%
  \ifx\@mc@reaction@align\@mc@reaction@center
  \end{center}
  \fi
  \ifx\@mc@reaction@align\@mc@reaction@left
  \end{flushleft}
  \fi
  \ifx\@mc@reaction@align\@mc@reaction@right
  \end{flushright}
  \fi
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% REAKTANDEN -------------------------------------------------------------------------- %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Standardreaktand -------------------------------------------------------------------- %
\newcommand{\@mc@reactand}[3][]{\draw node[on chain=going #1](#3) {#2};}
\providecommand{\reactand}[3][right]{\@mc@reactand[#1]{#2}{#3}}

% Mesomerie --------------------------------------------------------------------------- %
\newcommand{\@mc@mesomeric}[3][]{\draw node[inner sep=1pt,on chain=going #1,left delimiter={[},right delimiter={]}](#3) {#2};}
\providecommand{\mesomeric}[3][right]{\@mc@mesomeric[#1]{\begin{tikzpicture}[start branch]#2\end{tikzpicture}}{#3}}
\providecommand{\marrow}[1][right]{\arrow[type=<->,length=.5,direction=#1]{}{}}
\providecommand{\dummy}[1][]{\draw node[on chain,xshift=-\@rxn@node@distance](#1) {};}

% Uebergangszustand ------------------------------------------------------------------- %
\newcommand\@mc@transition@name{}
\newcommand{\@mc@transition}[3][]{
  \ifthenelse{\equal{#3}{}}{\renewcommand\@mc@transition@name{a}}{\renewcommand\@mc@transition@name{#3}}
  \draw node[inner sep=1pt,on chain=going #1,left delimiter={[},right delimiter={]}](\@mc@transition@name) {#2} node at ($(\@mc@transition@name.north east)+(.25,0)$) {$\ddagger$};
}
\providecommand{\transition}[3][right]{\@mc@transition[#1]{\begin{tikzpicture}[start branch]#2\end{tikzpicture}}{#3}}

% Abzweigung -------------------------------------------------------------------------- %
\newcommand{\@mc@branch}[3][]{\node[#1] (#3) {#2};}
\providecommand{\branch}[3][on chain=going right]{\@mc@branch[#1]{\begin{tikzpicture}[start branch]#2\end{tikzpicture}}{#3}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Sonstiges --------------------------------------------------------------------------- %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Elektronenverschiebungspfeile ------------------------------------------------------- %
\providecommand{\elmove}[5][->,red,shorten <=3pt,shorten >=1pt]{\chemmove{\draw[#1](#2).. controls +(#3) and +(#5)..(#4);}}
% Bindungslänge ----------------------------------------------------------------------- %
\newcommand{\@mc@bondlength}{\setatomsep{1.8em}}
\providecommand{\bondlength}[1]{
  \ifthenelse{\equal{#1}{}}{
    \renewcommand{\@mc@bondlength}{\setatomsep{1.8em}}
  }{
    \renewcommand{\@mc@bondlength}{\setatomsep{#1}}
  }
}
% Keilbindungen ----------------------------------------------------------------------- %
\newcommand{\@mc@bondshape@one}{3pt}
\newcommand{\@mc@bondshape@two}{.5pt}
\newcommand{\@mc@bondshape@three}{1pt}
\providecommand{\bondshape}[3]{
  \ifthenelse{\equal{#1}{}}{
    \renewcommand{\@mc@bondshape@one}{3pt}
  }{
    \renewcommand{\@mc@bondshape@one}{#1}
  }
  \ifthenelse{\equal{#2}{}}{
    \renewcommand{\@mc@bondshape@two}{.5pt}
  }{
    \renewcommand{\@mc@bondshape@two}{#2}
  }
  \ifthenelse{\equal{#3}{}}{
    \renewcommand{\@mc@bondshape@three}{1pt}
  }{
    \renewcommand{\@mc@bondshape@three}{#3}
  }
}
\newcommand{\@mc@bondshape}{\setcrambond{\@mc@bondshape@one}{\@mc@bondshape@two}{\@mc@bondshape@three}}
% Atomgröße --------------------------------------------------------------------------- %
\newcommand{\@mc@atomsize}{\small}
\providecommand{\atomsize}[1]{
  \ifthenelse{\equal{#1}{}}{
    \renewcommand{\@mc@atomsize}{\small}
  }{
    \renewcommand{\@mc@atomsize}{#1}
  }
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% NODES SICHTBAR/UNSICHTBAR MACHEN ---------------------------------------------------- %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newcommand\makevisible{
  \renewcommand{\@mc@branch}[3][]{\node[draw=purple,dotted,##1] (##3) {##2};}
  \renewcommand{\@mc@reactand}[3][]{\draw node[draw=red!60,solid,on chain=going ##1](##3) {##2};}
  \renewcommand{\@mc@mesomeric}[3][]{\draw node[draw=red!60,solid,on chain=going ##1,left delimiter={[},right delimiter={]}](##3) {##2};}
  \renewcommand{\@arrow}[3][]{
   \renewcommand{\@arrow@length@factor}{\@arrow@currentlength}
   \setlength{\@arrow@length@actual}{\@arrow@currentlength\@arrow@length@default}
   \ifthenelse{\equal{\@arrow@argument@both}{true}}{
     \@mc@largernode{##2}{##3}
   }{
     \setlength{\@arrow@argument@width}{0pt}
     \setlength{\@arrow@argument@height}{0pt}
   }
   \draw node[solid,on chain=going \@arrow@currentdirection](\@arrow@currentname) {\tikz{
     \@arrow@drawing
     }
   };
   \@arrow@argument@anchor
   \draw node[draw=green!60,solid,anchor=\@arrow@above@anchor,rotate=\@arrow@rotate,minimum width=\@arrow@argument@width, minimum height=\@arrow@argument@height]
    at ($(@arrow@center.base)+(90+\@arrow@argument@angle:\@arrow@argument@aboveshift)$) {##2};
   \draw node[draw=blue!60,solid,anchor=\@arrow@below@anchor,rotate=\@arrow@rotate,minimum width=\@arrow@argument@width, minimum height=\@arrow@argument@height]
    at ($(@arrow@center.base)+(-90+\@arrow@argument@angle:\@arrow@argument@belowshift)$) {##3};
   \setlength{\@arrow@argument@aboveshift}{2pt}
   \setlength{\@arrow@argument@belowshift}{2pt}
  }
}

\newcommand\makeinvisible{
  \renewcommand{\@mc@reactand}[3][]{\draw node[on chain=going ##1](##3) {##2};}
  \renewcommand{\@mc@mesomeric}[3][]{\draw node[on chain=going ##1,left delimiter={[},right delimiter={]}](##3) {##2};}
  \renewcommand{\@mc@branch}[3][]{\node[##1] (##3) {##2};}
  \renewcommand{\@arrow}[3][]{
   \renewcommand{\@arrow@length@factor}{\@arrow@currentlength}
   \setlength{\@arrow@length@actual}{\@arrow@currentlength\@arrow@length@default}
   \ifthenelse{\equal{\@arrow@argument@both}{true}}{
     \@mc@largernode{##2}{##3}
   }{
     \setlength{\@arrow@argument@width}{0pt}
     \setlength{\@arrow@argument@height}{0pt}
   }
   \draw node[on chain=going \@arrow@currentdirection](\@arrow@currentname) {\tikz{
     \@arrow@drawing
     }
   };
   \@arrow@argument@anchor
   \draw node[anchor=\@arrow@above@anchor,rotate=\@arrow@rotate,minimum width=\@arrow@argument@width, minimum height=\@arrow@argument@height]
    at ($(@arrow@center.base)+(90+\@arrow@argument@angle:\@arrow@argument@aboveshift)$) {##2};
   \draw node[anchor=\@arrow@below@anchor,rotate=\@arrow@rotate,minimum width=\@arrow@argument@width, minimum height=\@arrow@argument@height]
    at ($(@arrow@center.base)+(-90+\@arrow@argument@angle:\@arrow@argument@belowshift)$) {##3};
   \setlength{\@arrow@argument@aboveshift}{2pt}
   \setlength{\@arrow@argument@belowshift}{2pt}
  }
}
% ------------------------------------------------------------------------------------- %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%