I have some chemical reaction equations which I want to reference in the subscript of an inline equation.

    \text{NO} +\text{O}_3 &-> \text{NO}_2 +\text{O}_2\label{eq:example1},\\
    \text{NO} + \text{O}_3 &-> \text{NO}_2^* + \text{O}_2\label{eq:example2},



I want to refer to eq:example 2 as the subscript for k, so if example2 was equation 1b, it would be equivalent to:


But 1b obviously changing according to the equation numbering. Is there any way to do this, as putting \ref in the $$ symbols does not work.


You may just set the reference in text mode. Load amsmath or mathtools for this.

% arara: pdflatex
% arara: pdflatex


        \cee{NO + O3 &-> NO2 + O2\label{eq:example1}\\
            NO + O3 &-> NO2^* + O2\label{eq:example2}}
 $k_\text{\ref{eq:example1}}\ne k_\text{\eqref{eq:example2}}$

enter image description here

  • Thanks! Managed to get it to work, MikTex couldn't originally find mathtools, but fixed it by going to MikTex/Bin/ and running mpm_mfc_admin, then going Repository/Synchronise. Seems that the package manager hadn't updated since Mh got split into mathtools and breqn. – Alzinos Nov 14 '14 at 17:38

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