Chamberlain, Edward Edinborough2011-12-132022-10-312011-12-132022-10-3119281928https://ir.wgtn.ac.nz/handle/123456789/27089The isomerism of p-azophenol was first studied in detail by R. Willstätter and M. Benz (Ber. 1906, 39, 3492; 1907, 40, 1578). They found that azophenol obtained directly by the alkali fusion of p-nitrophenol differed from that obtained by the reduction of benzoquinoneazine, which is itself the oxidation product of p-azophenol. The object of their work was to discover the nature of this isomerism. A careful survey of their results led them to classify these isomers as geometric isomers.pdfen-NZAzo compoundsChemistryText