Summary
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1.
A study was made of the isomerization of azoxybenzene-N15 into o- and p-hydroxy azo compounds under the action of sulfuric and chlorosulfonic acids, acetic anhydride, and also ultraviolet radiation.
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2.
There are at least two types of rearrangements of azoxybenzene (and probably of other azoxy compounds): a) rearrangement of azoxybenzene into p-(phenylazo)phenol via an intermediate symmetric compound, in which case both benzene rings are hydroxylated in equal degree; b) rearrangement of azoxybenzene into o-(phenylazo)-phenol without a symmetrization stage, in which case the benzene ring remote from the NO group is hydroxylated.
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For Communication 9 see [1]; for the preliminary results of this work see [2].