Fehler pgfkey
Beim compilieren des Codes unten erhielt ich die Fehlermeldung:
! >! Package pgfkeys Error: I do not know the key '/tikz/left delimiter' and I am
going to ignore it. Perhaps you mispelled it.
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Was mache ich falsch ?
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\documentclass[draft]{scrbook}
\usepackage{ngerman}
\usepackage[utf8]{inputenc}
\usepackage{tikz,chemfig}
\usetikzlibrary{shadows,arrows,intersections}
\begin{document}
\tikzset{obrace/.style={left
\tikzset{
obrace/.style={left delimiter={[},inner sep=3pt},
cbrace/.style={right delimiter={]},inner sep=3pt},
braces/.style={left delimiter={[},right delimiter={]},inner sep=3pt}}
%%%%%%%%%%%%%%%%%
sep=3pt}
}
\setatomsep{2em}
\schemestart
\chemfig{H-C(=[:-60]O)-[:60]O-H}
\arrow(--M1[obrace]){-U>[\scriptsize\chemfig{H_2SO_4^{}}][\scriptsize\chemfig{HSO_4^\ominus}][][.25]}%
[,1.5,shorten >=6pt]
\chemfig{H-@{a2}C(-[:60]O-H)(-[:30,.5,,,draw=none]{\scriptstyle\oplus})-[:-60]O-H}
\arrow(--[cbrace]){<->}
\schemestop
\end{document}
