Math & Science ⇒ Dipolar bonds with XymTeX

[feynman]

Hello!
I can't find a way to draw dipolar bonds using XymTeX.

For example, how to draw the "arrow bond" in this molecule:

images.jpg (2.72 KiB) Viewed 5674 times

thank you


Edit by localghost: Preferably no external links (see Board Rules). Attachments go onto the forum server where possible.

[localghost]

[…] I can't find a way to draw dipolar bonds using XymTeX. […]

Then try the excellent chemfig package.


Best regards and welcome to the board
Thorsten

[feynman]

Hi! Thanks for the answer and the welcome

I looked at the package documentation, but i can't find any example of dipolar bond, can you please show me in what page of the doc there is a dipolar bond?

Thanks

[localghost]

My reply was only a random shot. I must confess that I never saw such a representation of a (bi)polar bond. So I suggest to contact both package maintainers and ask for help regarding a possible solution. Even with some tricks I found no solution to do it with chemfig.

[feynman]

My reply was only a random shot. I must confess that I never saw such a representation of a (bi)polar bond. So I suggest to contact both package maintainers and ask for help regarding a possible solution. Even with some tricks I found no solution to do it with chemfig.

Ok, thanks anyway for your help

[localghost]

Ok, thanks anyway for your help […]

Please report back as soon as you got an answer.

[feynman]

Ok, thanks anyway for your help […]

Please report back as soon as you got an answer.

Mmm it's strange, i can't find anywhere the email of the package creator (Shinsaku Fujita). Do you know where to foind it? (Nothing on his website or in google)

[unbonpetit]

Even with some tricks I found no solution to do it with chemfig.

It is important to undersatnd that the "@" char puts a global tikz node. After that, everything can be done with TikZ and nodes (ie a lot of things) is possible. For example, you can draw an arrow to link 2 nodes :

Capture1.png

Code: Select all

\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}

[feynman]

I guess you are the same person who reply at the same request into the italian Latex forum. Thanks again for your help I'm going to learn TikZ and chemfig after exams

[unbonpetit]

I guess you are the same person who reply at the same request into the italian Latex forum. Thanks again for your help I'm going to learn TikZ and chemfig after exams

Yes, I'm the author of the package, I know it pretty well