Complexes of trimethylplatinum(IV) with butane-2,3-dione monoxime

Abstract

The dimeric complex of butane-2,3-dione monoxime (Hbdm) with trimethylplatinum(IV), [{PtMe₃(bdm)}₂]1, and its pyridine (py) and 2,2′-bipyridyl (bipy) adducts [PtMe₃(bdm)(py)] and [PtMe₃(bdm)(bipy)], show three different configurations for the ionised monoxime ligand. Dimer 1 forms a fluxional solvated monomer in co-ordinating solvents. Its solution-state stereodynamics in CD₃OD have been measured by two-dimensional exchange NMR spectroscopy and a ‘windscreen-wiper’ mechanism proposed which is novel in trimethylplatinum(IV) chemistry.