TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I want to draw this formula using chemfig:

BCA Cu+ Complex

This is what I've got so far:


my try

I don't get the angle from N to Cu+ right. I tried to rotate parts of the formula, but there is always at least one angle that does not fit.

Any idea?

share|improve this question
Welcome to TeX.SX! – strpeter Dec 31 '13 at 15:34
up vote 6 down vote accepted

Yes, I have an idea:


enter image description here

share|improve this answer

The following code is similar to what unbonpetit wrote. The term .5 in [0,.5] and [180,.5] is chosen such that the aromatic cycles do not get too big.

(-[:+ 45]N([0,.5]**6(---(-COO^{-})-**6(------)--)))

enter image description here

share|improve this answer
@unbonpetit: I don't see the point... – strpeter Dec 31 '13 at 16:28
It is not exactly the same since your inner ring has 6 bonds instead of 5. Moreover, your code is not more or less explicit than mine, even after several edits. – unbonpetit Dec 31 '13 at 16:29
I must admit that the term "explicit" is misleading. – strpeter Dec 31 '13 at 16:37

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.