Mercury(II) acetate-assisted oxidative hydrolysis of thiosemicarbazones of benzaldehyde, acetophenone and benzophenone by potassium bromate
摘要:
Thiosemicarbazones of benzaldehydes, acetophenones and benzophenones are oxidatively hydrolysed by potassium bromate, {Br(v)}, in the presence of mercury(II) acetate, as Hg(II) forms a complex with sulphur atoms, increasing the lability of the N-H bond. The rates of these reactions are less susceptible to the electronic influence of the substituents at the phenyl ring compared with other oxidants, showing that N-bromate ester formation is the rate-determining step of this reaction. Such N-bromate ester formation seems to occur more readily with Hg(II)-sulphur complexes.