EPR study of electron transfer and group transfer in organoplatinum(II) and (IV) compounds. Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry, 12:2573--2577, 1997. [PUMA: 4 anion;ESR chelate chelate;electron chelate;homolysis diazabutadiene diazabutadiene;methyl diazabutadiene;platinum electrochem group mesityl methyl organoplatinum photochem platinum radical radical;photohomolysis redn transfer]