PHOTOREACTION OF BENZOIC ACID WITH SODIUM HYPOCHLORITE IN AQUEOUS ALKALI

Article abstract of DOI:10.1039/P29840000985

The photoreaction of benzoic acid with sodium hypochlorite in aqueous alkali (pH > 12) has been studied.At a low initial ratio of , e.g, 0.1, hydroxylation and chlorination at the aromatic ring occur simultaneously with ipso-substitution of the carboxylate group to give hydroxy- and chlorobenzoic acids together with phenol.The product distribution depends on the wavelength of the light, which implies the dependence on the concentration of avtive species generated from ClO(1-) and on the light stability of products.At comparable concentrations of ClO(1-) and PhCOO(1-), the products initially formed from the photoreaction react further with ClO(1-) in the dark to give polychlorinated derivatives.The initial steps for the photoreaction are discussed on the basis of the reactivity of the active species, O(3P), O(1D), O(1-)(.), and Cl(.), generated by photolysis of ClO(1-).

Full text of DOI:10.1039/P29840000985

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