Steric Impact of Neutral N,N-Chelates on the Structure and Stability of Five-Coordinate Platinum(IV) Complexes: fac-PtIVMe3 Complexes of BAB and BAM

Two neutral 7-azaindolyl derivative ligands, BAB and BAM, have been found to have a distinct impact on the structure and stability of five-coordinate Pt IV Me 3 complexes. A five-coordinate Pt IV complex of BAB and two six-coordinate Pt IV complexes of BAM have been isolated, which display distinct dynamic behavior in solution. The BAM ligand can be converted to an N,C,N-chelate that forms a stable six-coordinate Pt IV complex.