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S. Nimura, O. Kikuchi, T. Ohana, A. Yabe, and M. Kaise
[Chem. Lett., pp.1679-1682, 1994]
In photolysis of 4,4'-diazidodiphenyl sulfide, quintet ESR peaks were observed and plots of these signal intensities vs. temperature obeyed the Curie law, although no quintet signals were observed in the photolysis of 4,4'-diazidodiphenyl ether. The ESR spectrum upon the irradiation of 3,4'-diazidodiphenyl sulfide at low temperature showed quintet resonances of 3,4'-dinitrenodiphenyl sulfide. Both Curie analysis and PM3-CI calculations indicated that the quintet state is a ground-state.
