Pt(IV) derivatives formed by oxidative addition of organic halides to [Pt(CH3)2(N,N-chelate)] substrates:: geometric isomers at equilibrium

The geometrical isomerism at equilibrium of Pt(IV) derivatives of general formula [Pt(CH3)(2)(R)X(N-N)] (N-N = 2,9-dimethyl-1,10-phenanthroline or 1,10-phenanthroline; R = sigma C-bonded ligand; X = halide) has been investigated by variation of R, X, and N-N. The complexes have been obtained mainly through oxidative addition of RX to [Pt(CH3)(2)(N-N)]. Some general trends can be traced in the relative stability of the geometrical isomers of the complexes, and attempts to discriminate sterical and electronic factors have been presented. The first attainment of a compound of the general formula [Pt(CH3)(2)(R)R'(N-N)] containing three different types of sigma C-bonded groups is also reported. (C) 2000 Elsevier Science S.A. All rights reserved.