Chemfig Scheme: wrong alignement of a reaction

Question

I'm trying to use chemfig to put a reaction in my document, but the diferent molecules are missaligned. How I coul fix it? This is my code:

\documentclass{article}
\usepackage{chemfig}
\usepackage{mhchem}


\begin{document}

\begin{center}
\schemestart
\chemfig{*6(---=--)}
\arrow{->[\ce{e^-}]}
\charge{30:4pt=$\bullet +$}{\chemleft( \chemfig{*6(---=--)} \chemright)}
\quad $\equiv$ \quad
\chemleft( \chemfig{*6(---(-[:30,0.33,,,draw=none]\oplus)-(-[2,0.33,,,draw=none]\bullet)--)} \chemright)
\quad $\equiv$ \quad
\chemleft( \chemfig{*6(---(-[:30,0.33,,,draw=none]\bullet)-(-[2,0.33,,,draw=none]\oplus)--)} \chemright)
\schemestop
\end{center}


\end{document}

And this is the figure:

Answer 1

\documentclass{article}
\usepackage{chemfig}
\begin{document}
\begin{center}
    \schemestart
    \chemfig{*6(---=--)}
    \arrow{->[$\mathrm{e}^{-}$]}
    \chemleft( \chemfig{*6(---\charge{30:20pt=$\bullet +$}{}=--)} \chemright)
    \arrow{0}[,0.2]$\equiv$\arrow{0}[,0.2]
    \chemleft( \chemfig{*6(---\charge{30:4pt=$\oplus$}{}-\charge{90:4pt=$\bullet$}{}--)}~ \chemright)
    \arrow{0}[,0.2]$\equiv$\arrow{0}[,0.2]
    \chemleft( \chemfig{*6(---\charge{30:4pt=$\bullet$}{}-\charge{90:4pt=$\oplus$}{}--)}~ \chemright)
    \schemestop
\end{center}
\end{document}

Answer 2

You can also use the new tool "QuickReaction" quickreaction

Quickreaction aligns the molecules, no matter where you start drawing the molecule in ChemFig;

You can place multiple lines of text above and below the arrows;

Adding the name of molecules is easy.

\documentclass{article}
\usepackage{xparse}
\usepackage{tikz}
\usepackage{chemfig}
\usepackage[version=4]{mhchem}
\usepackage[iupac]{quickreaction}
\begin{document}
    \begin{quickreaction}
        \chemfig{*6(---=--)} \&
        \quickarrow[\ce{e^-}] \&
        \chemleft( \chemfig{*6(---=--)} \chemright{)^{\bullet +}}
        \& $\equiv$ \&
        \chemleft( \chemfig{*6(---(-[:30,0.33,,,draw=none]\oplus)-(-[2,0.33,,,draw=none]\bullet)--)} \chemright)
        \& $\equiv$ \&
        \chemleft( \chemfig{*6(---(-[:30,0.33,,,draw=none]\bullet)-(-[2,0.33,,,draw=none]\oplus)--)} \chemright) \\
    \end{quickreaction}
\end{document}