Diphenylnitrogen

Although diphenylnitrogen oxide is unstable, dianisylnitrogen oxide may be kept for a long time. 

The linkage between the two N-atoms is here firmer than in the carbon prototype. Dissociation into the diphenylnitrogen radicles in solution is not perceptible to the eye below about 80° ... 

The radicle N02 also has an analogue in the aromatic series. When diphenylhydroxylamine is dehydrogenated with silver oxide the beautifully crystalline gamet-red diphenylnitrogen oxide is formed ... 

Ph2N PhsN - NPh2 diphenylnitrogen from tetraphenylhydrazine In a strict sense also ... 

Reduction of In by the hydroxyperoxy radical was established in the following way [79]. Tetraphenylhydrazine added to cyclohexanol in the presence of an initiator decomposed to diphenylnitrogen radicals which were reduced to diphenylamine. No reduction was observed in the absence... 

The intermediate diarylnitrogen radicals obtained are substantially less stable than the corresponding azotoxides, and readily recombine and disproportionate. The primary diphenylnitrogen radicals cannot be detected by the EPR method even in the thermal dissociation of tetraphenyl-hydrazine under vacuum. However, the corresponding azotoxides are extremely stable. Figure 38 presents the EPR spectrum of diphenyl-azotoxide (IX), produced in the catalytic decomposition of hydroperoxides in the presence of diphenylamine. 

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