Triphenylmethyl compounds rearrangement

In reactions involving triphenylmethyldifluoramine (I), rearrangement of the nitrene (VIII b) appears to be favored energetically, since benzophenone anil (II) was the only product found. II has been reported as the principal product of thermal decomposition of triphenylmethyl, N-triphenylmethylhydroxylamine, and a number of related compounds... 

Aromatic-aliphatic azo compounds can without exception be prepared by oxidation of the corresponding JV-alkyl-A -arylhydrazines. The oxidant must be one that reacts in neutral or alkaline conditions since the azo product rearranges to arylhydrazone in an acid medium. Mercury(n) oxide, introduced by Emil Fischer341 as oxidant, is almost always used for this reaction. 30% Hydrogen peroxide in hydrogen carbonate solution has been applied to dehydrogenation of A-aryl-A -(triphenylmethyl)hydrazines with good results.342... 

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