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+%%
+%% This is file `bpchem.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% bpchem.dtx  (with options: `bpchem')
+%% 
+%% IMPORTANT NOTICE:
+%% 
+%% For the copyright see the source file.
+%% 
+%% Any modified versions of this file must be renamed
+%% with new filenames distinct from bpchem.sty.
+%% 
+%% For distribution of the original source see the terms
+%% for copying and modification in the file bpchem.dtx.
+%% 
+%% This generated file may be distributed as long as the
+%% original source files, as listed above, are part of the
+%% same distribution. (The sources need not necessarily be
+%% in the same archive or directory.)
+%% File: bpchem.dtx Copyright (C) 2001
+%%                 Bjoern Pedersen <Bjoern.Pedersen@ch.tum.de>
+%% This file may be distributed and used freely under
+%% the Latex Project Public License
+%%
+%%
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{bpchem}[2004/11/06 v1.05 Chemical input helper]
+\RequirePackage{xspace}
+ %\IUPAC{Tetra\|cyclo[2.2.2.1\^{1,4}]\-
+
+
+
+
+
+\newif\ifusecbgreek%
+\usecbgreekfalse%
+\DeclareOption{cbgreek}{\PackageInfo{bpchem}{cbgreek selected}\usecbgreektrue}
+\ProcessOptions\relax
+%% Define a  textsubscript corresponing to textsuperscript.
+%% This is now also available as the package textsubscript by
+%% D.Arsenau or as part of KOMA-Script2 by M. Kohm.
+%%
+%%
+\providecommand*\textsubscript[1]{%
+  \@textsubscript{\selectfont#1}}
+\def\@textsubscript#1{%
+  {\m@th\ensuremath{_{\mbox{\fontsize\sf@size\z@#1}}}}}
+%% a register to save the length to backspace
+%% two registers needed to get back to correct
+%% working position if one is longer than the other.
+  \newlength{\BPClensub}
+  \newlength{\BPClensuper}
+  \newlength{\BPCdelta}
+
+%% we are in subscript and maybe  the superscript was longer
+  \DeclareRobustCommand{\BPCadjustsub}{%
+    \setlength\BPCdelta{\BPClensuper}\addtolength\BPCdelta{-\BPClensub}%
+    \ifdim\BPCdelta>0pt{\kern\BPCdelta}\else\relax\fi%
+    \setlength{\BPClensub}{0pt}% reset
+    \setlength{\BPClensuper}{0pt}% reset
+    }%
+%% we are in superscript and maybe  the subscript was longer
+  \DeclareRobustCommand{\BPCadjustsuper}{%
+    \setlength\BPCdelta{\BPClensub}\addtolength\BPCdelta{-\BPClensuper}%
+    \ifdim\BPCdelta>0pt{\kern\BPCdelta}\else\relax\fi%
+    \setlength{\BPClensub}{0pt}% reset
+    \setlength{\BPClensuper}{0pt}% reset
+    }%
+%% make a subscript and remember length in BPClen
+  \DeclareRobustCommand{\BPCsub}[1]{%
+    \ifmmode_{#1}\settowidth\BPClensub{_{#1}}%
+    \else\textsubscript{#1}\settowidth\BPClensub{\textsubscript{#1}}\fi%
+    \futurelet\next\lookforsuper%
+    }%
+%% make a superscript and remember length in BPClen
+%% raise by 0.15 em, else e.g. + collides with subscript
+  \DeclareRobustCommand{\BPCsuper}[1]{%
+    \ifmmode^{#1}\settowidth\BPClensuper{^{#1}}%
+    \else\raisebox{0.15em}{\textsuperscript{#1}}%
+    \settowidth\BPClensuper{\textsuperscript{#1}}\fi%
+    \futurelet\next\lookforsub%
+    }%
+%% see if next token is BPCsuper,
+  \DeclareRobustCommand\lookforsuper{%
+    \ifx\next\BPCsuper\let\next=\BPCsuperbs%
+    \else\let\next=\BPCadjustsub\fi\next%
+    }%
+%% see if next token is BPCsub
+  \DeclareRobustCommand\lookforsub{%
+    \ifx\next\BPCsub\let\next=\BPCsubbs%
+    \else\let\next=\BPCadjustsuper\fi\next%
+    }%
+%%  backspace BPClen and make superscript
+%%  eats the old \verb|\^|
+  \DeclareRobustCommand{\BPCsuperbs}[1]{\kern-\BPClensub\BPCsuper}%
+%% backspace and make subscript
+%% eats   the old \_
+  \DeclareRobustCommand{\BPCsubbs}[1]{\kern-\BPClensuper\BPCsub}%
+%% needed to get catcodes right
+  \DeclareRobustCommand{\DoBPChem}{}%
+  \def\DoBPChem#1{%
+    #1\endgroup%
+    }%
+\DeclareRobustCommand{\BPCSetupCat}{}
+\def\BPCSetupCat{%
+  %\catcode`^=\active%
+  %\catcode`\_=\active%
+  \BPCSetup%
+}%
+\DeclareRobustCommand{\BPCSetup}{}
+\def\BPCSetup{%
+ \let\_=\BPCsub%
+ \let\^=\BPCsuper%
+}%end BPCSetup
+%% setup for chemical formula
+\DeclareRobustCommand\BPChem{%
+  \begingroup% endgroup in DoBPChem
+  \BPCSetupCat%
+  \DoBPChem%
+  }
+
+%% these are taken from german.sty and allow more than one break
+%% or breaks and hyphens in a word. Very useful for chemical names,
+%% as they tend to grow rather long. Two short versions are also defined
+\DeclareRobustCommand{\allowhyphens}{\penalty\@M \hskip\z@skip}
+\DeclareRobustCommand{\BreakHyph}{\penalty\@M -\allowhyphens}
+\DeclareRobustCommand{\MultiBreak}%
+                {\penalty\@M\discretionary{-}{}{\kern.03em}%
+                \allowhyphens}
+\let\MB=\MultiBreak \let\BH=\BreakHyph
+\DeclareRobustCommand{\DoIUPAC}[1]{%
+#1\endgroup}
+\def\Prep{%
+\let\-=\BreakHyph%
+\let\|=\MultiBreak%
+\DoIUPAC%
+}
+\DeclareRobustCommand*{\IUPAC}{%
+  \begingroup\BPCSetup\ignorespaces%
+  \Prep}%
+
+%% Trick by  David Kastrup <David.Kastrup@t-online.de> to make
+%% non-fragile. Otherwise \verb+\|+ would become \verb+\delimiter"026B30D+ in
+%% e.g. the toc
+\expandafter\DeclareRobustCommand\expandafter\|\expandafter{\|}
+\expandafter\DeclareRobustCommand\expandafter\-\expandafter{\-}
+%%%%%%%%%%%%%%%%
+%% counters for numbering of chemical substances
+\newcounter{BPCno}
+\renewcommand{\theBPCno}{\textbf{\arabic{BPCno}}}
+
+\newcounter{BPCnoa}[BPCno]
+\renewcommand{\theBPCnoa}{\textbf{\arabic{BPCno}\alph{BPCnoa}}}
+
+%% helper functions to mark first definition
+\newcommand{\newchems@b}[2]{
+\expandafter\gdef\csname cna@#1#2\endcsname{#2}%
+}
+
+%% reference a CNlabel (useful for section titles, captions etc.)
+\DeclareRobustCommand*{\CNref}[1]{%
+\ref{cn:#1}%
+}
+
+%% reference a CNlabel/sublabel
+\DeclareRobustCommand*{\CNrefsub}[2]{%
+\ref{cn:#1#2}
+%%\textbf{\csname cna@#1#2\endcsname}%
+}
+
+%% label a substance and insert the number
+\DeclareRobustCommand*{\CNlabel}[1]{%
+\CNlabelnoref{#1}
+\CNref{#1}%
+}
+
+%%
+\DeclareRobustCommand*{\CNlabelnoref}[1]{%
+\expandafter\ifx\csname cnd@#1\endcsname\relax%
+{\refstepcounter{BPCno}\label{cn:#1}}%
+\expandafter\gdef\csname cnd@#1\endcsname{x}%
+\fi%
+}
+\DeclareRobustCommand*{\CNlabelsub}[2]{%
+\CNlabelsubnoref{#1}{#2}%
+\CNrefsub{#1}{#2}%
+}
+\DeclareRobustCommand*{\CNlabelsubnoref}[2]{%
+\CNlabelnoref{#1}%
+\expandafter\ifx\csname cna@#1#2\endcsname\relax%
+{\refstepcounter{BPCnoa}\label{cn:#1#2}}%
+\expandafter\gdef\csname cna@#1#2\endcsname{x}%
+%% \newchems@b{#1}{#2}%
+%%   \write\@auxout{\string\newchems@b{#1}{#2}}%
+  \fi%
+}
+%% more helper mcors
+\DeclareRobustCommand{\HNMR}{\IUPAC{\^{1}H-NMR}: $\delta$\xspace}
+\DeclareRobustCommand{\CNMR}{\IUPAC{\^{13}C-NMR}: $\delta$\xspace}
+\DeclareRobustCommand{\cis}{\textit{cis}\xspace}
+\DeclareRobustCommand{\trans}{\textit{trans}\xspace}
+%%%%%%%%%%%%%%%%%%%%%
+\ifusecbgreek% code with roman greek
+\PackageInfo{bpchem}{using upright greek fonts from cbgreek}
+\input{lgrenc.def}
+\DeclareRobustCommand{\rm@greekletter}[1]{{\fontencoding{LGR}\selectfont%
+     \def\encodingdefault{LGR}#1}}%
+\DeclareRobustCommand{\bpalpha}{\rm@greekletter{a}}
+\DeclareRobustCommand{\bpbeta}{\rm@greekletter{b}}
+\DeclareRobustCommand{\bpDelta}{\rm@greekletter{D}}
+\DeclareRobustCommand{\hapto}[1]{\rm@greekletter{h}\^{#1}}
+\else
+\PackageInfo{bpchem}{using default math greek fonts}
+\DeclareRobustCommand{\bpalpha}{\ensuremath{\alpha}\xspace}
+\DeclareRobustCommand{\bpbeta}{\ensuremath{\beta}\xspace}
+\DeclareRobustCommand{\bpDelta}{\ensuremath{\Delta}\xspace}
+\DeclareRobustCommand{\hapto}[1]{\ensuremath{\eta^{#1}}}
+\fi
+\let\talpha\bpalpha
+\let\tbeta\bpbeta
+%%%%%%
+\DeclareRobustCommand*{\dreh}[1]%
+{$\lbrack \alpha \rbrack _{\mathrm D}^{#1}$}
+\endinput
+%%
+%% End of file `bpchem.sty'.