如何在 CHEMFIG 中垂直调整多个反应？
答案1
你可以使用\noindent或align在fleqn
\documentclass{article}
\usepackage[utf8x]{inputenc}
\usepackage{chemfig}
\usepackage{amssymb}
%\usepackage{amsmath}
\usepackage{tabularx}
\usetikzlibrary{arrows}
\usetikzlibrary{calc,arrows.meta}% per right to e left to
\tikzset{myedge/.style={->, -{Latex[#1]}}}
\usepackage{nccmath}
\begin{document}
\noindent \textbf{Step 1: generation of radicals}
\begin{fleqn}
\begin{align*}
\schemestart
%
\chemfig{R@b\lewis{2:6:,O}-[@a]-[@c]@d\lewis{2:6:,O}H}
%
\arrow{->[$h\nu$ (light) \quad or \quad $\triangle$ (heat)]}[0,3]
%
\chemnameinit{2pt}
\chemname{\chemfig{2\, \, R\lewis{0.2:6:,O}}}{}
%
\chemmove{
\draw[myedge={right},red,shorten <=1pt,shorten >=0pt](a).. controls +(90:4mm) and +(40:4mm)..(b);
\draw[myedge={left},red,shorten <=1pt,shorten >=0pt](c).. controls +(90:4mm) and +(140:4mm)..(d);
}
\schemestop
\end{align*}
\begin{align*}
\schemestart
%
\chemfig{R-[0,1.5]\lewis{0.2:6:,O}\hspace{2pt}@e}
%
\chemfig{+\hspace{12pt}@f\hspace{12pt}}
%
\chemfig{H-[@g]-[@h]@i\lewis{0:2:6:,Br}}
%
\arrow{->}
%
\chemfig{R-[0,1.5]\lewis{2:6:,O}H}
%
\+
%
\chemfig{\lewis{0.2:4:6:,Br}}
%
\chemmove{
\draw[myedge={left},red,shorten <=5pt,shorten >=1pt](e.0).. controls +(90:8mm) and +(120:8mm)..(f);
\draw[myedge={right},red,shorten <=1pt,shorten >=1pt](g).. controls +(90:8mm) and +(60:8mm)..(f);
\draw[myedge={left},red,shorten <=0pt,shorten >=1pt](h).. controls +(100:4mm) and +(140:6mm)..(i);
}
\schemestop
\end{align*}
\begin{align*}
\schemestart
\chemfig{*6(=-*6(-\chembelow{N}{H}-NH_2)=-=-)}\+\chemfig{(=[:-150]O)(-[:-30]R_2)-[2]-[:150]R_1}\arrow(.mid east--.mid west){->[\chemfig{H^+}]}\chemfig{*6(-=*5(-\chembelow{N}{H}-(-R_2)=(-R_1)-)-=-=)}
\schemestop
\end{align*}
\begin{align*}
\schemestart
\chemfig{C([3]-)([5]-)=[@{db,.5}]@{atoo}\charge{0=\|,-90=\|}{O}}\arrow(.mid east--.mid west){<->}\chemfig{\charge{90:3pt=$\scriptstyle\oplus$}{C}([3]-)([5]-)-%
\charge{0=\|,90=\|,-90=\|,45:3pt=$\scriptstyle\ominus$}{O}}
\schemestop
\end{align*}
\begin{align*}
\schemestart
\chemfig{R-\charge{225:3pt=$\scriptstyle\oplus$}{N}([1]=[@{db}]@{atoo1}O)([7]-[@{sb}]@{atoo2}\charge{45=\|,-45=\|,-135=\|,45:5pt=$\scriptstyle\ominus$}{O})}\arrow(.mid east--.mid west){<->}\chemfig{R-\charge{135:3pt=$\scriptstyle\oplus$}{N}([1]-\charge{90:3pt=$\scriptstyle\ominus$}{O})([7]=O)}
\schemestop
\chemmove{\draw[shorten <=2pt, shorten >=2pt](db) ..controls +(120:5mm) and +(120:7mm)..(atoo1);\draw[shorten <=3pt, shorten >=2pt](atoo2) ..controls +(225:10mm) and +(225:10mm)..(sb);}
\end{align*}
\end{fleqn}
\end{document}
答案2
在 CHEMFIG 中，垂直调整多个反应并不容易。使用“隐形箭头”是一种难以正确调整的选项，尤其是在需要多条线的情况下。
我发现一种实现此目的的方法是使用“tabularx”环境将反应放在表格中。每行必须包含完整的反应方案。空行可用于在反应之间插入垂直空格。请参阅下面的通用模型：
\begin{tabularx}{265pt}{l}
<text> \\
\\
\schemestart <reaction 1> \schemestop \\
\\
\schemestart <reaction 1> \schemestop \\
\end{tabularx}
%--------------------------------------------------------- % 完整模式 %-------------------------------------------------------------------------
\documentclass[margin={1mm 1mm}]{standalone}
\usepackage[utf8x]{inputenc}
\usepackage{chemfig}
\usepackage{amssymb}
\usepackage{tabularx}
\setatomsep{1.8em}
\usetikzlibrary{arrows}
\usetikzlibrary{calc,arrows.meta}% per right to e left to
\tikzset{myedge/.style={->, -{Latex[#1]}}}
\begin{document}
\begin{tabularx}{265pt}{l}
%
\textbf{Step 1: generation of radicals}
\\
\\
%---------------------------------------------------------------------------
\schemestart
%
\chemfig{R@b\lewis{2:6:,O}-[@a]-[@c]@d\lewis{2:6:,O}H}
%
\arrow{->[$h\nu$ (light) \quad or \quad $\triangle$ (heat)]}[0,3]
%
\chemnameinit{2pt}
\chemname{\chemfig{2\, \, R\lewis{0.2:6:,O}}}{}
%
\chemmove{
\draw[myedge={right},red,shorten <=1pt,shorten >=0pt](a).. controls +(90:4mm) and +(40:4mm)..(b);
\draw[myedge={left},red,shorten <=1pt,shorten >=0pt](c).. controls +(90:4mm) and +(140:4mm)..(d);
}
\schemestop
\\
\\
%---------------------------------------------------
\schemestart
%
\chemfig{R-[0,1.5]\lewis{0.2:6:,O}\hspace{2pt}@e}
%
\chemfig{+\hspace{12pt}@f\hspace{12pt}}
%
\chemfig{H-[@g]-[@h]@i\lewis{0:2:6:,Br}}
%
\arrow{->}
%
\chemfig{R-[0,1.5]\lewis{2:6:,O}H}
%
\+
%
\chemfig{\lewis{0.2:4:6:,Br}}
%
\chemmove{
\draw[myedge={left},red,shorten <=5pt,shorten >=1pt](e.0).. controls +(90:8mm) and +(120:8mm)..(f);
\draw[myedge={right},red,shorten <=1pt,shorten >=1pt](g).. controls +(90:8mm) and +(60:8mm)..(f);
\draw[myedge={left},red,shorten <=0pt,shorten >=1pt](h).. controls +(100:4mm) and +(140:6mm)..(i);
}
\schemestop
\\
%-----------------------------------------------------
\end{tabularx}
\end{document}
%---------------------------------------------------------- 结果为：
如果使用“隐形箭头”调整反应似乎很容易，请尝试使用多条线。（9 行）
您还可以执行以下操作：
