例
![[Pasted image 20260131184322.png]]
α-D-吡喃葡萄糖
船式（boat conformation）
• 正视图
\usepackage{chemfig}
\begin{document}
\chemfig[cram width=2pt,atom sep=2.5]{
HO
%4
-[0.3,0.7,2]?(-[2,0.7]H)
%3
<[7,](-[5.7,0.7,,1]OH)(-[4.1,0.7]H)
%2
-[,,,,line width=2pt](-[7.9,0.7]OH)(-[6.2,0.7]H)
%1
>[1,](-[7.5,0.7]OH)(-[2,0.7]H)
-[4.5,0.75]O-[4,1]?(
%5
-[2.3,0.7]
%6
-[1,0.7]OH
)(-[5.5,0.7]H)
}
\end{document}• 加角度
\usepackage{chemfig}
\begin{document}
\chemfig[cram width=2pt,atom sep=2.5]{
HO
%4
-[,0.7,2]?(-[1.5,0.7]H)
%3
<[7,](-[5.5,0.7,,1]OH)(-[3.5,0.7]H)
%2
-[,,,,line width=2pt](-[0.5,0.7]OH)(-[6.5,0.7]H)
%1
>[1,](-[,0.7]OH)(-[2.5,0.7]H)
-[4.5,0.6]O-[4,1]?(
%5
-[3,0.7]
%6
-[1,0.7]HO
)(-[5.5,0.7]H)
}
\end{document}• 简化
\usepackage{chemfig}
\begin{document}
\chemfig[cram width=2pt,atom sep=2.5]{
HO
%4
-[2,0.7,2]?
%3
<[7,](-[2,0.7]OH)
%2
-[,,,,line width=2pt](-[6,0.7]OH)
%1
>[1,](-[6,0.7]OH)
-[4.5,0.6]O-[4,1]?(
%5
-[2,0.7]
%6
-[3,0.7]HO
)
}
\end{document}椅式（chair conformation）
椅式I（稳定）
-
\usepackage{chemfig}
\begin{document}
\chemfig[cram width=2pt,atom sep=2.5]{
% C4
?(-[:190,0.7]HO)(-[2,0.7]H)
% C3
<[:-50](-[:170,0.7]HO)(-[6,0.7]H)
% C2
-[:10,,,,line width=2pt](-[:-55,0.7]OH)(-[2,0.7]H)
% C1
>[:-10](-[6,0.7]OH)(-[:10,0.7]H)
% O
-[:130]O
% C5
-[:190]?(
% C6
-[:120,0.7,,1]-[1,0.7]OH
)(-[6,0.7]H)
}
\end{document}-
\usepackage{chemfig}
\begin{document}
\chemfig[cram width=2pt,atom sep=2.5]{
% C4
?(-[:190,0.7]HO)
% C3
<[:-50](-[:170,0.7]HO)
% C2
-[:10,,,,line width=2pt](-[:-55,0.7]OH)
% C1
>[:-10](-[6,0.7]OH)
-[:130]O
% C5
-[:190]?(
% C6
-[:120,0.7]-[1,0.7]OH
)
}
\end{document}椅式II（不稳定）
-
\usepackage{chemfig}
\begin{document}
\chemfig[cram width=2pt,atom sep=2.5]{
% C1
?(-[:-10,0.7]H)(-[2,0.7]OH)
% C2
<[:230](-[:10,0.7]H)(-[6,0.7]OH)
% C3
-[:170,,,,line width=2pt](-[:235,0.7]H)(-[2,0.7]OH)
% C4
>[:190](-[6,0.7]OH)(-[:170,0.7]H)
% C5
-[:50](
% C6
-[2,0.7]-[3,0.7]HO
)(-[4.3,0.7]H)
% O
-[:-10]O?
}
\end{document}-
\usepackage{chemfig}
\begin{document}
\chemfig[cram width=2pt,atom sep=2.5]{
% C1
?(-[2,0.7]OH)
% C2
<[:230](-[6,0.7]OH)
% C3
-[:170,,,,line width=2pt](-[2,0.7]OH)
% C4
>[:190](-[6,0.7]OH)
% C5
-[:50](
% C6
-[2,0.7]-[1,0.7]OH
)
% O
-[:-10]O?
}
\end{document}---
-
\usepackage{chemfig}
\begin{document}
\chemfig[cram width=2pt]{
?(-[:190]HO)
% C3
<[:-50](-[:170]HO)
% C2
-[:10,,,,line width=2pt](-[:-55,0.7]OH)
>[:-10](-[6,0.7]OH)
-[:130]O-[:190]?(-[:150,0.7]-[2,0.7]OH)
}
\end{document}