Abstract

Anisotropic ESR spectra (THF, frozen glass, 77 K) of PhCN2Se2˙ provide valuable information about the electronic structure of the diselenadiazolyl radical. Reaction of PhCN2Se2˙ with Pt(PPh3)3 in CH2Cl2 yielded the first diselenadiazolyl–metal complex, Pt[PhCN2Se2][PPh3]2. The electronic structures of both compounds are described in comparison with their sulphur analogues and the isoelectronic SN2E2+˙ radicals (E = S, Se).

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