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Azoxy
Azoxy compounds are a group of chemical compounds sharing a common functional group with the general structure RN=N+(O−)R. They are considered N-oxides of azo compounds. Azoxy compounds are 1,3-dipoles. They undergo 1,3 dipolar cycloaddition with double bonds. ==Preparation== Most azoxy-containing compounds have aryl substituents. They are typically prepared by reduction of nitrocompounds, such as the reduction of nitrobenzene with arsenous oxide.〔H. E. Bigelow and Albert Palmer "Azoybenzene" Org. Synth. 1931, 11, 16. 〕 Such reactions are proposed to proceed via the intermediacy of the hydroxylamine and nitroso compounds, e.g. phenylhydroxylamine and nitrosobenzene: :PhNHOH + PhNO → PhN(O)NPh + H2O
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