Chemarr – Arrows for chemists

Very often chemists need a longer version of reaction arrows (\rightleftharpoons) with the possibility to put text above and below. Analogous to amsmath's \xrightarrow and \xleftarrow this package provides the macro \xrightleftharpoons. The package requires amsmath. To use it, \usepackage{chemarr}, then \xrightleftharpoons[below]{above} .

The package is part of the oberdiek bundle.

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