# Mathjax-Catalysts on reaction arrows

How can mathjax be used with \ce to show reaction conditions and catalysts on the arrow?

$\ce{LiK + e- ->[this?]}$
Use square brackets immediately after the arrow. Eg $\ce{ A ->[above][below] B}$ gives $\ce{ A ->[above][below] B}$. You may omit the brackets for the below-arrow bit if you wish.
• @bobthechemist \require{mhchem} should work for a single page (Other extensions can be used this way too). Otherwise you can make a meta post for it to be enabled on all pages for the site if you have a good enough case for it. – ManishEarth Aug 19 '13 at 14:43
• @ManishEarth Offtopic but, is $\ce{LiK}$ a real compound? I head diatomic species like $\ce{Li2}$ and $\ce{K2}$ exist and are explained by MOT, so why not $\ce{LiK}$? – Pritt says Reinstate Monica Jun 9 '17 at 1:45