Oxidation by silver carbonate on Celite gives azo compounds with primary aromatic amines. Hydrazones are rapidly converted into diazoalkanes, which rearrange into azines. Hydroxylamines give nitrones. Oximes of aromatic aldehydes give nitrile oxides, characterised by their 1, 3-dipolar adducts with olefins, nitriles and oximes; 1, 2, 4- oxadiazoles are obtained in fair yields by this method.
