Legame dativo con Xymtex

Salve a tutti

Ho letto tutti e 9 i manuali di Xymtex una decina di volte, ma non riesco a trovare un modo per disegnare i legami dativi.

Per esempio, come posso disegnare il legame dativo (a “freccia”) presente in questa molecola:

?
Grazie in anticipo 🙂

thank you 🙂

Hai provato a guardare chemfig? Mi pare molto potente: si appoggia su pgf e tikz.

Ciao
Enrico

I suggest you to read the manual another time and use the “@” char 😛 which allow to di almost everything.
Compile this code twice :
`\documentclass{article}
\usepackage{chemfig}
\begin{document}
\chemfig{@a\lewis{2:,N}(-[:-20]H)(-[:-75,0.8]H)(-[:-160]H)-[@{b,1}2,,,,draw=none]H\rlap{${}^+$}}
\chemmove{\draw[-stealth,shorten <=5pt](a)--(b);} \end{document}`

Thanks a lot!
But i really didn’t saw anything like that into the pdf manual, i guess i have to read it better 🙂

Sure! 😛

It has to see with the “@” char which put a global tikz node (i.e. the node exists after the molecule has been drawn). With the “\chemmove” macro, you can do what you want with these “global nodes”: draw an arrow, a curved bond, or anything possible with tikz.