\definesubmol\nobond{-[,0.2,,,draw=none]}
\def\hammond{\text{\textit{\ddag}}}
\def\rotate{0}
\newcommand{\setpolymerdelim}[2]
{%
  \def\delimleft{#1}%
  \def\delimright{#2}%
}
\setpolymerdelim[]
\newcommand{\reaction}[2]{\arrow{->[\tiny\begin{tabular}{@{}l@{\,}l@{}}#1\end{tabular}][\tiny\begin{tabular}{@{}l@{\,}l@{}}#2\end{tabular}]}}

\let\@chemfig=\chemfig
\let\@chemmove=\chemmove
\renewcommand{\chemfig}[1]{{\@ResetSymbols\@chemfig{#1}}}
\renewcommand{\chemmove}[1]{{\@ResetSymbols\@chemmove{#1}}}

\def\@WrapChemSide{o}
\def\@WrappedOrScheme{wrapped}
\def\enableWrapped{\def\@WrappedOrScheme{wrapped}}
\def\disableWrapped{\def\@WrappedOrScheme{scheme}}
\newcommand{\initAngle}[2]{[:#2]}
\def\MayHorizontalChem{\quad}
\def\@WrappendEnvironment{\renewcommand{\initAngle}[2]{[:##1]}\def\MayHorizontalChem{\arrow{0}[-90,0.1]}}
\def\@Cheme@DefaultScale{1.5}
\newcommand{\chemeDefaultScale}[1][1.5]{\def\@Cheme@DefaultScale{#1}}

\definesubmol\nobond{[,0.2,,,draw=none]}
%\definesubmol\numAtom{-[,0.4,,,draw=none]\scriptstyle}
\newcommand{\NumAtom}[2]{}
\newcommand{\numAtom}[1]{\NumAtom{,0.4}{#1}}
\newcommand{\numAtomWith}[2]{\NumAtom{::#1,0.4}{#2}}
\def\numAtoms{\renewcommand{\NumAtom}[2]{-[##1,,,draw=none]{##2}}}

\setchemfig
{
  atom sep                              =   14.4pt,
  double bond sep                       =    2.6pt,
  bond style                            =   {line width=0.6pt},
  cram rectangle                        =   false,
  cram width                            =    2.0pt,
  cram dash width                       =    0.6pt,
  cram dash sep                         =    1.0pt,
  bond offset                           =    1.6pt,
  bond join                             =   true,
  lewis length                          =    1.0ex,
  compound sep                          =    5.0em,
  arrow offset                          =    5.0pt,
  scheme debug                          =   false,
}
\renewcommand*\printatom[1]{{\scriptsize\ensuremath{\mathsf{#1}}}}

%\AtBeginDocument
%{
%  \RenewDocumentCommand\ch{O{}m}{\directlua
%  {
%    if  chLevel ==  0
%    then
%      tex.print
%      (
%        bs.."csname chemformula_ch:nn"..bs.."endcsname {#1}"
%      )
%    end
%    chLevel                             =   chLevel + 1
%  }{#2}\directlua
%  {
%    chLevel                             =   chLevel - 1
%  }}
%}

\tikzset
{
  onehalf/.style args={#1}
  {
    draw=none,
    decoration=
    {
      markings,
      mark=at position 0 with
      {
        \coordinate (CF@startdeloc) at (0,\dimexpr#1\CF@double@sep/2) coordinate (CF@startaxis) at (0,\dimexpr-#1\CF@double@sep/2);
      },
      mark=at position 1 with
      {
        \coordinate (CF@enddeloc) at (0,\dimexpr#1\CF@double@sep/2) coordinate (CF@endaxis) at (0,\dimexpr-#1\CF@double@sep/2);
        \draw[dash pattern=on 2pt off 1.5pt] (CF@startdeloc)--(CF@enddeloc);
        \draw (CF@startaxis)--(CF@endaxis);
      }
    },
    postaction={decorate}
  }
}

\newcommand{\arrowText}[1]{\begin{tabular}{@{}c@{\,}l@{}}#1\end{tabular}}
\newcommand{\cheme}[3][\@Cheme@DefaultScale]
{%sorry for this pun :D
  \scalebox{#1}%
  {%
    %\setchemfig{scheme debug=true}%
    \schemestart#2\schemestop%
    \chemmove{#3}%
  }%
  \chemnameinit{}%
}
%\newcommand{\chem}[3][\@Cheme@DefaultScale]
%{
%  \begin{subfigure}[b]{\linewidth}
%    \centering
%    \cheme[#1]{#2}{#3}
%  \end{subfigure}
%}
\newcommand{\thecchem}[5]
{
  %1 – float
  %2 – short caption
  %3 – content
  %4 – long caption
  %5 – label
  \begin{scheme}[#1]
    \centering
    #3
    \ifthenelse{\isempty{#4}}
    {}
    {
      \ifthenelse{\isempty{#2}}
        {\caption[\nolink{#4}]{\adjustCaption{#4}}}
        {\caption[\nolink{#2}]{\adjustCaption{#4}}}
    }
    \labelScheme{#5}
  \end{scheme}
}
\newcommand{\thelchem}[5]
{
  %1 – float
  %2 – short caption
  %3 – content
  %4 – long caption
  %5 – label
  \begin{scheme}[#1]
    #3
    \ifthenelse{\isempty{#4}}
    {}
    {
      \ifthenelse{\isempty{#2}}
        {\caption[\nolink{#4}]{\adjustCaption{#4}}}
        {\caption[\nolink{#2}]{\adjustCaption{#4}}}
    }
    \labelScheme{#5}
  \end{scheme}
}
\newcommand{\cchem}[1][]{\thecchem{!htbp}{#1}}
\newcommand{\hchem}[1][]{\thecchem{H}{#1}}
\newcommand{\lchem}[1][]{\thelchem{H}{#1}}

\newcommand{\thesubchem}[5]
{
  %1 – float
  %2 – relative width
  %3 – content
  %4 – long caption
  %5 – beamer settings
  \begin{subfigure}[#1]{#2}%
    \centering%
    \ifthenelse{\isempty{#5}}%
    {%
      \cheme#3%
      \ifthenelse{\isempty{#4}}{}{\caption[\nolink{#4}]{\adjustCaption{#4}}}%
    }%
    {%
      \uncover#5%
      {%
        \cheme#3%
        \ifthenelse{\isempty{#4}}{}{\caption[\nolink{#4}]{\adjustCaption{#4}}}%
      }%
    }%
  \end{subfigure}%
}
\newcommand{\subchem}[4][b]{\thesubchem{#1}{#2}{#3}{#4}{}}

\newcommand{\Wrapchem}[3][]
{{
  \@WrappendEnvironment%
  %\begin{samepage}
  \ifthenelse{\equal{#1}{}}
    {\begin{wrapfigure}{\@WrapChemSide}{\widthof{\cheme{#2}{}}}\cheme{#2}{}\end{wrapfigure}}
    {\begin{wrapfigure}{\@WrapChemSide}{#1\linewidth}\centering\cheme{#2}{}\end{wrapfigure}}%
  #3\par
  %\end{samepage}
}}
\newcommand{\wrapchem}[3][]{\Wrapchem[#1]{\chemfig{#2}}{#3}}

\newcommand{\MayWrapchem}[5][]
{%
  \ifthenelse{\equal{\@WrappedOrScheme}{wrapped}}%
    {\Wrapchem[#1]{#2}{#5}}%
    {\hchem{\cheme{#2}{}}{#3}{#4}#5\par}%
}
\newcommand{\MayRefchem}[1]
{%
  \ifthenelse{\equal{\@WrappedOrScheme}{wrapped}}%
    {}%
    { (\refScheme{#1})}%
}

\def\makebraces(#1,#2)#3#4#5%
{%
  % 1 – Offset 1
  % 2 – Offset 2
  % 3 – Index
  % 4 – Left Node
  % 5 – Right Node
  %\edef\delimhalfdim{\the\dimexpr(#1+#2)/2}%
  %\edef\delimvshift{\the\dimexpr(#1-#2)/2}%
  %\node[at=(#4),yshift=(\delimvshift)]
  %{$\left\delimleft\vrule height\delimhalfdim depth\delimhalfdim width0pt\right.$};%
  %\node[at=(#5),yshift=(\delimvshift)]%
  %{$\left.\vrule height\delimhalfdim depth\delimhalfdim width0pt\right\delimright_{\rlap{$\scriptstyle#3$}}$};%
  \polymerdelim[delimiters ={[]}, height = 5pt, depth = 10pt, indice = #3]{#4}{#5}%
}
\def\Makebraces(#1,#2)#3#4#5%
{%
  % 1 – Offset 1
  % 2 – Offset 2
  % 3 – Index
  % 4 – Left Node
  % 5 – Right Node
  \edef\delimhalfdim{\the\dimexpr(#1+#2)/2}%
  \edef\delimvshift{\the\dimexpr(#1-#2)/2}%
  \node[at=(#4),yshift=(\delimvshift)]
  {$\left\delimleft\vrule height\delimhalfdim depth\delimhalfdim width0pt\right.$};%
  \node[at=(#5),yshift=(\delimvshift)]%
  {$\left.\vrule height\delimhalfdim depth\delimhalfdim width0pt\right\delimright^{\rlap{$\scriptstyle#3$}}$};%
}

\catcode`\_11
\definearrow3{s>}{%
\ifx\empty#1\empty
  \expandafter\draw\expandafter[\CF_arrowcurrentstyle,-CF](\CF_arrowstartnode)--(\CF_arrowendnode);%
\else
  \def\curvedarrow_style{shorten <=\CF_arrowoffset,shorten >=\CF_arrowoffset,}%
  \CF_eaddtomacro\curvedarrow_style\CF_arrowcurrentstyle
  \expandafter\draw\expandafter[\curvedarrow_style,-CF](\CF_arrowstartname)..controls#1..(\CF_arrowendname);
  \ifx\empty#2\empty\else
    abc
  \fi
\fi
}
\definearrow7{-u>}{%
	\CF_arrowshiftnodes{#3}%
	\CF_expafter{\draw[}\CF_arrowcurrentstyle](\CF_arrowstartnode)--(\CF_arrowendnode)node[midway](Uarrow@arctangent){};%
	\CF_ifempty{#4}
		{\def\CF_Uarrowradius{0.333}}
		{\def\CF_Uarrowradius{#4}}%
	\CF_ifempty{#5}%
		{\def\CF_Uarrowabsangle{60}}
		{\pgfmathsetmacro\CF_Uarrowabsangle{abs(#5)}}
	\expandafter\draw\expanded{[\CF_ifempty{#1}{draw=none}{\unexpanded\expandafter{\CF_arrowcurrentstyle}},-]}(Uarrow@arctangent)%
		arc[radius=\CF_compoundsep*\CF_currentarrowlength*\CF_Uarrowradius,start angle=\CF_arrowcurrentangle+90,delta angle=\CF_Uarrowabsangle]node(Uarrow@start){};
	\expandafter\draw\expanded{[\CF_ifempty{#2}{draw=none}{\unexpanded\expandafter{\CF_arrowcurrentstyle}}]}(Uarrow@arctangent)%
		arc[radius=\CF_compoundsep*\CF_currentarrowlength*\CF_Uarrowradius,start angle=\CF_arrowcurrentangle+90,delta angle=-\CF_Uarrowabsangle]node(Uarrow@end){};
	\pgfmathsetmacro\CF_temp{\CF_Uarrowradius*cos(\CF_arrowcurrentangle)<0?"+":"-"}%
	\ifdim\CF_Uarrowradius pt>0pt
		\CF_arrowdisplaylabel{#1}{0}\CF_temp{Uarrow@start}{#2}{1}\CF_temp{Uarrow@end}%
	\else
		\CF_arrowdisplaylabel{#2}{0}\CF_temp{Uarrow@start}{#1}{1}\CF_temp{Uarrow@end}%
	\fi%
  \CF_arrowdisplaylabel{#6}{0.5}+\CF_arrowstartnode{#7}{0.5}-\CF_arrowendnode
}
\definearrow7{-U>}{%
	\CF_arrowshiftnodes{#3}%
	\CF_expafter{\draw[}\CF_arrowcurrentstyle](\CF_arrowstartnode)--(\CF_arrowendnode)node[midway](Uarrow@arctangent){};%
	\CF_ifempty{#4}
		{\def\CF_Uarrowradius{0.333}}
		{\def\CF_Uarrowradius{#4}}%
	\CF_ifempty{#5}%
		{\def\CF_Uarrowabsangle{60}}
		{\pgfmathsetmacro\CF_Uarrowabsangle{abs(#5)}}% ne prendre en compte que la valeur absolue de l'angle
	\expandafter\draw\expanded{[\CF_ifempty{#1}{draw=none}{\unexpanded\expandafter{\CF_arrowcurrentstyle}},-]}(Uarrow@arctangent)%
		arc[radius=\CF_compoundsep*\CF_currentarrowlength*\CF_Uarrowradius,start angle=\CF_arrowcurrentangle-90,delta angle=-\CF_Uarrowabsangle]node(Uarrow@start){};
	\expandafter\draw\expanded{[\CF_ifempty{#2}{draw=none}{\unexpanded\expandafter{\CF_arrowcurrentstyle}}]}(Uarrow@arctangent)%
		arc[radius=\CF_compoundsep*\CF_currentarrowlength*\CF_Uarrowradius,start angle=\CF_arrowcurrentangle-90,delta angle=\CF_Uarrowabsangle]node(Uarrow@end){};
	\pgfmathsetmacro\CF_temp{\CF_Uarrowradius*cos(\CF_arrowcurrentangle)<0?"-":"+"}%
	\ifdim\CF_Uarrowradius pt>0pt
		\CF_arrowdisplaylabel{#1}{0}\CF_temp{Uarrow@start}{#2}{1}\CF_temp{Uarrow@end}%
	\else
		\CF_arrowdisplaylabel{#2}{0}\CF_temp{Uarrow@start}{#1}{1}\CF_temp{Uarrow@end}%
	\fi%
  \CF_arrowdisplaylabel{#6}{0.5}+\CF_arrowstartnode{#7}{0.5}-\CF_arrowendnode
}
\catcode`\_8

% From https://tex.stackexchange.com/questions/260884/chemfig-how-to-do-these-wavy-markings
\pgfdeclaredecoration{complete sines}{initial}{
  \state{initial}[
    width=+0pt,
    next state=sine,
    persistent precomputation={
      \pgfmathsetmacro\matchinglength{
        \pgfdecoratedinputsegmentlength /
        int(\pgfdecoratedinputsegmentlength/\pgfdecorationsegmentlength)
      }
      \setlength{\pgfdecorationsegmentlength}{\matchinglength pt}
    }]{}
  \state{sine}[width=\pgfdecorationsegmentlength]{
      \pgfpathsine{
        \pgfpoint
          {0.125\pgfdecorationsegmentlength}
          {0.25\pgfdecorationsegmentamplitude}
      }
      \pgfpathcosine{
        \pgfpoint
          {0.125\pgfdecorationsegmentlength}
          {-0.25\pgfdecorationsegmentamplitude}
      }
      \pgfpathsine{
        \pgfpoint
          {0.125\pgfdecorationsegmentlength}
          {-0.25\pgfdecorationsegmentamplitude}
      }
      \pgfpathcosine{
        \pgfpoint
          {0.125\pgfdecorationsegmentlength}
          {0.25\pgfdecorationsegmentamplitude}
      }
  }
  \state{final}{}
}
\tikzset{wv/.style={decorate,decoration=complete sines}}
\definesubmol{chainRest}2{#1[#2,.5]((-[::90,1,,,wv])-[::-90,1,,,wv])}
\definesubmol{chainStart}2{[#2](-[::90,1,,,wv])(-[::-90,1,,,wv])#1[,.5]}
\definesubmol{weakBond}2{-[#1,#2,,,dash pattern=on 2pt off 2pt]}


%ferrocene
%\wrapchem
%{
%  -[:\rotate-303.51,0.4476]%(-[::96.755]4')%
%  -[::303.51,,,,]%(-[::26.755]5')%
%  -[::303.51,0.4476]%(-[::35.835]1')%
%  <[::251.67,0.7741]@{r5}{}%(-[::74.820]2')%
%  >[::329.64,0.7741]%(-[::35.835]3')%
%  -[::205.18,0.7472,,,draw=none]@{r1}{}-[::80,0.70]%
%  Fe
%  -[::  0,0.85]\ -[::0,0]@{r2}{}-[::85,0.7472,,,draw=none]
%  <[::128.51,0.4476]@{r3}{}%(-[::263.245]3)%
%  -[:: 56.49,,,,line width=2pt]@{r4}{}%(-[::333.245]2)%
%  >[:: 56.49,0.4476]%(-[::324.165]1)%
%  -[::108.33,0.7741]%(-[::285.180]5)%
%  -[::30.36,0.7741]%(-[::334.255]4)
%}
%{
%  \draw[rotate=\rotate] (r1) ellipse (6pt and 2pt);
%  \draw[rotate=\rotate] (r2) ellipse (6pt and 2pt);
%  \draw[-,rotate=\rotate,line width=0.6pt] (r2) -- ++(270:2pt);
%  \fill[rotate=\rotate] (r3) ellipse (1.3pt and 1pt);
%  \fill[rotate=\rotate] (r4) ellipse (1.3pt and 1pt);
%  \fill[rotate=\rotate] (r5) ellipse (1pt and 1.3pt);
%}