Evidence for adsorption as the first step in the solid-state oxidation of benzenehexol with active manganese dioxide
Abstract
Oxidation of benzenehexol on the surface of amorphous, precipitated (‘active’) manganese dioxide proceeds by a concerted mechanism, involving ionic and free-radical pathways, to give a croconic acid derivative. This manganese dioxide has a polycrystalline chain structure, in contrast to the crystalline oxidant prepared in deuterium oxide.