Reaction of cobaltic perchlorate with benzene in aqueous perchloric acid

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Abstract
In the slow reaction of cobaltic ions with benzene any variation with acidity involves only the cobaltic ion. The rate-determining step is the initial attack of cobaltic ions on benzene and the rate of disappearance of cobaltic ion in the presence of excess benzene is first order in [benzene] and first order in [cobaltic ion]. The bimolecular rate constant k varies with acidity according to k=k1+k2/[H+], and this is interpreted as the reaction of the aquocobaltic ion and its first hydrolysis product. Energies of activation and temperature-independent factors are derived and discussed in terms of the composition of the transition state. The spectra of the products are consistent with the presence of p-benzoquinone and muconic acid.

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