Electrochemistry and spectroelectrochemistry (EPR, UV-visible-near-IR) of platinum(II) 2,2'-bipyridine and ring-metalated bipyridine complexes: PtII(L-) and PtI(L-) but not PtI(L). Inorganic Chemistry, (31)24:5084--5088, 1992. [PUMA: UV bipyridine dimethylbipyridine potential;redn electrochem complex elec redox pyridine ESR;platinum platinum reversible spectrum;diaminoethane phenathroline electroredn;dimethylaminobipyridine]