chemfig：彩色原子不排列，如何与电荷形成键？

Question

所以我想展示分子和带电元素之间的离子相互作用。但是当我使用颜色突出显示分子的一部分时，键排列不再正确。第一个例子没问题，其他两个显示了问题。我尝试了两种不同的方法在钙和电荷（\ominus）之间画线，结果很奇怪。我使用的是 texlive 和 chemfig v1.0h 2013 年 11 月 28 日。

\documentclass{article}
\usepackage{chemfig,amsmath}
\newcommand{\gammach}{$\gamma$}
\begin{document}

\schemedebug{false}
\definesubmol{Glu}{
    [:0,0.75]\phantom{X}-[:30]HN-
     ([:60]
      --[:0]
       (-[:60]COO^{\ominus}
       )
     )
    (-[::-60]CO-[:0,0.5]\vphantom{X})
}
\schemestart
 \chemname{  \chemfig{ !{Glu} }}{glutamic acid}
\arrow{->[\gammach-carboxylase]}
\chemname{\chemfig{
    [:0,0.75]\phantom{X}-[:30]HN-
     ([:60]
      --[:0]
       (-[:60]COO^{\ominus}
        (-[:-40,0.975,,,dotted]Ca^{2+}?[Cahook])
       )
       (-[:-60]COO^{\ominus}-[,0.2,,,draw=none]?[Cahook,1,dotted,red])
     )
    (-[:-60]CO-[:0,0.5]\phantom{X})
}}{\gammach-carboxylated glutamic acid}
\schemestop

\schemestart
\chemname{\chemfig{ !{Glu} }}{glutamic acid}
\arrow{->[\gammach-carboxylase][\+ \color{red}CO$_2$]}
\chemname{\chemfig{
    [:0,0.75]\phantom{X}-[:30]HN-
     ([:60]
      --[:0]
       (-[:60]COO^{\ominus}
        (-[:-40,0.975,,,dotted]Ca^{2+}?[Cahook])
       )
   (-[:-60]{\color{red}COO^{\ominus}}-[,0.2,,,draw=none]?[Cahook,1,dotted,red])
     )
    (-[:-60]CO-[:0,0.5]\phantom{X})
 }}{\gammach-carboxylated glutamic acid}
\schemestop

\qquad

\schemestart
\chemname{\chemfig{ !{Glu} }}{glutamic acid}
\arrow{->[\gammach-carboxylase][\+ \color{red}CO$_2$]}
\chemname{\chemfig{
    [:0,0.75]\phantom{X}-[:30]HN-
     ([:60]
      --[:00]
       (-[:60]COO^{\ominus{}}@{higherCOO}
        (-[:-30,0.975,,,dotted,red]Ca^{2+}@{ca})
       )
       (-[:-60,,,,blue]{\color{red}COO^{\scriptstyle\ominus{}}
               }@{lowerCOO}-[:30,0.975,,,green,dotted]
       )
     )
    (-[:-60]CO-[:0,0.55])
 }}{\gammach-carboxylated glutamic acid}
\schemestop

\chemmove{ \draw[red,dotted] (ca)--(lowerCOO); }

\end{document}

Answer 1

这是我的尝试：

\documentclass{article}
\usepackage{chemfig}
\newcommand\gammach{$\gamma$}
\begin{document}
\setbondstyle{thick}
\schemedebug{false}
\definesubmol{Glu}{[:0,0.75]-[:30]HN-([:60]--[:0](-[:60]COO^\ominus))(-[::-60]CO-[:0,0.5])}
\schemestart
    \chemname{\chemfig{!{Glu}}}{glutamic acid}
    \arrow{->[\gammach-carboxylase]}
    \chemname{%
        \chemfig{ [,0.75]%
        -[:30]HN-([:60]--[:0](-[:60]COO|^\ominus(-[:-40,1,,,dotted]Ca?|^{2+}))%
        (-[:-60]COO^\ominus?[,,dotted,red]))(-[:-60]CO-[:0,0.5])}}%
        {\gammach-carboxylated glutamic acid}%
\schemestop
\bigbreak

\schemestart
    \chemname{\chemfig{!{Glu}}}{glutamic acid}
    \arrow{->[\gammach-carboxylase][\+ \color{red}CO$_2$]}
    \chemname{%
        \chemfig{ [,0.75]%
        -[:30]HN-([:60]--[:0](-[:60]COO|^\ominus(-[:-40,1,,,dotted]Ca?|^{2+}))%
        (-[:-60]{\color{red}C}|{\color{red}O}|{\color{red}O^\ominus}?[,,dotted,red]))(-[:-60]CO-[:0,0.5])}}%
        {\gammach-carboxylated glutamic acid}%
\schemestop
\bigbreak

\schemestart
    \chemname{\chemfig{!{Glu}}}{glutamic acid}
    \arrow{->[\gammach-carboxylase][\+ \color{red}CO$_2$]}
    \chemname{%
        \chemfig{ [,0.75]%
        -[:30]HN-([:60]--[:0](-[:60]COO|^\ominus(-[:-40,1,,,dotted]Ca?|^{2+}))%
        (-[:-60,,,,blue]{\color{red}C}|{\color{red}O}|{\color{red}O^\ominus}?[,,dotted,green]))(-[:-60]CO-[:0,0.5])}}%
        {\gammach-carboxylated glutamic acid}%
\schemestop
\end{document}