{Fe^{3+}}の加水分解

\documentclass[b5j,9pt]{tetsujsarticle}
\usepackage{tetsuchem}
\pagestyle{fancy}

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\begin{document}
\小見出し{\ce{Fe^{3+}}の加水分解}

\begin{center}
\begin{tikzpicture}
\node[circle,draw] (Fe) at (0,0) {\ce{Fe^{3+}}};
\node (O) at (2,0) {O};
\node (H1) at (3.5,1) {H};
\node (H2) at (3.5,-1) {H};
\draw[-latex] (O) -- (Fe);
\draw (O) -- (H1);
\draw (O) -- (H2);
\draw (2.85,0) ellipse (1.2cm and 1.8cm);
\draw[densely dashed] (1,0.25) .. controls (1,0.5) and (0.65,1.25) .. (0.45,1.5) node[left]{\footnotesize 配位結合};
\node[single arrow,draw,fill,single arrow tip angle=60,single arrow head indent=2mm,rotate=180,scale=0.9] at(1,-0.5) {\makebox[4zw][l]{}};
\node[single arrow,draw,fill,single arrow tip angle=60,single arrow head indent=2mm,rotate=215,scale=0.9] at(2.75,1) {\makebox[3zw][l]{}};
\node[single arrow,draw,fill,single arrow tip angle=60,single arrow head indent=2mm,rotate=145,scale=0.9] at(2.75,-1) {\makebox[3zw][l]{}};
\node at (1,-1) {\ce{e-}};
\node at (2.75,1.5) {\ce{e-}};
\node at (2.75,-1.5) {\ce{e-}};
\end{tikzpicture}
\end{center}

\br1
\小見出し{矢印の図}

\begin{tikzpicture}
\draw[->] (0,0) -- (0,3) node[above] {酸の強さ};
\draw[->] (5.5,3) -- (5.5,0) node[below] {塩基の強さ};
\node[draw,ellipse] at (1.5,0.5) {\ce{H2O}};
\node[draw,ellipse] (左中) at (1.5,1.5) {\ce{CH3COOH}};
\node (左上) at (1.5,2.5) {\ce{H3O+}};
\node at (4.5,0.5) {\ce{OH-}};
\node (右中) at (4.5,1.5) {\ce{CH3COO-}};
\node[draw,ellipse] (右上) at (4.5,2.5) {\ce{H2O}};
\draw[latex-latex,densely dashed,thick] (右上) -- (左中);
\draw[-latex,densely dashed,thick] (右上) -- (左上);
\draw[-latex,densely dashed,thick] (左中) -- (右中);
\end{tikzpicture}

\br1
\begin{tikzpicture}
\draw[->] (0,0) -- (0,3) node[above] {酸の強さ};
\draw[->] (5.5,3) -- (5.5,0) node[below] {塩基の強さ};
\node[draw,ellipse] (左下) at (1.5,0.5) {\ce{H2O}};
\node[draw,ellipse] (左中) at (1.5,1.5) {\ce{CH3COOH}};
\node at (1.5,2.5) {\ce{H3O+}};
\node[draw,ellipse] (右下) at (4.5,0.5) {\ce{OH-}};
\node (右中) at (4.5,1.5) {\ce{CH3COO-}};
\node[draw,ellipse] (右上) at (4.5,2.5) {\ce{H2O}};
\draw[latex-latex,thick] (左中) -- (右下);
\draw[-latex,thick] (右下) -- (左下);
\draw[-latex,thick] (左中) -- (右中);
\node at (2.75,-0.5) {反応前};
\end{tikzpicture}\ihspace{3zw}
\begin{tikzpicture}
\draw[->] (0,0) -- (0,3) node[above] {酸の強さ};
\draw[->] (6.5,3) -- (6.5,0) node[below] {塩基の強さ};
\node[draw,ellipse] (左下) at (1.5,0.5) {\ce{H2O}};
\node[draw,ellipse] (左中) at (1.5,1.5) {\ce{CH3COOH}};
\node at (1.5,2.5) {\ce{H3O+}};
\node at (5,0.5) {\ce{OH-}};
\node[draw,ellipse] (右中) at (5,1.5) {\ce{CH3COO-}};
\node[draw,ellipse] at (5,2.5) {\ce{H2O}};
\draw[latex-latex,thick] (左中) -- (右中) node[midway,above] {水平};
\node at (3.25,-0.5) {反応後};
\end{tikzpicture}



\end{document}