Reactions of New Organoplatinum(II) and -(IV) Complexes of 1,4-Diaza-1,3-butadienes with Light and Electrons. Emission vs Photochemistry and the Electronic Structures of Ground, Reduced, Oxidized, and Low-Lying Charge-Transfer Excited States. Organometallics, (17)2:237--247, 1998. [PUMA: HF MO alkyl aryl charge chelate chelate;DAB chelate;diazabutadiene chelate;oxidized diazabutadiene excited low lying organoplatinum platinum prepn prepn;electronic reaction;DFT structure transfer]