How do you draw a dative bond with chemfig?

Question

How do you draw a dative / coordinate bond with chemfig? I would like to have the bond to appear as an arrow.

Answer 1

Use the TikZ parameter of the corresponding bond, i.e., the fifth parameter in the optional argument and specify an arrow according to TikZ syntax:

\documentclass{article}
\usepackage{chemfig}

\begin{document}

\chemfig{A-[,,,,->]B-[:30,,,,<-]A}

\end{document}