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I would like to denote a molecular ion using the chemcompounds package. This would involve wrapping part of a chemcompounds descriptor in square brackets, like so:


However, because the chemcompounds name argument is placed between square brackets, trying to do this causes an error.

How is it done?




This species is denoted \compound{c1}.

This molecular ion is denoted \compound{c1c}.

%This molecular ion breaks chemcompounds: \compound{c1bc}.


(I have commented out the lines that break compilation)

share|improve this question
It is always best to compose a MWE that illustrates the problem including the \documentclass and the appropriate packages so that those trying to help don't have to recreate it. – Peter Grill Nov 8 '11 at 2:42
up vote 5 down vote accepted

Normally, an extra pair of braces solves this kind of problem:






enter image description here

If this was not the case, while you provide a proper MWE with chemcompounds, I would suggest you to use the mhchem package instead:





enter image description here

share|improve this answer
The extra braces fix the problem, thanks. I already use mhchem for formulae, but chemcompounds serves a different role, namely the consistent abbreviation of compounds. – Richard Terrett Nov 8 '11 at 3:15

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