I'm trying to draw mesomeric effect for a molecule using chemfig I would like to create something like this:

enter image description here

From the documentation page (see chapter 11 "Representing electron movements")seems easy but I've spent the last 4 hours without any success. The first arrow is the most difficult because goes form lewis pair to the bond.

\draw[->](sb1)..controls +(90:4mm) and +(45:4mm)..(dncc);}

This is the molecule without anything else:


If possible I would like an explanation of my faults!


Here is how to draw the 2 first arrows:

\chemmove[-stealth,shorten <=1pt, shorten >=1pt]{%
    \draw(a2)..controls +(90:5mm) and +(135:5mm)..(a1);% first arrow
    \draw(r1)..controls +(225:12mm) and +(300:12mm)..(r2);% ring arrow

enter image description here

  • 1
    +1 thanks, so when I have to use @{a2} instead of [@{a2}]? – G M Mar 27 '14 at 14:26
  • 2
    @{<name>} to put a node in an atom and [@{<name>}] to put it in a bond. – unbonpetit Mar 27 '14 at 17:53

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