Synthesis and characterization of new dimethylplatinum(IV) complexes with o-(diphenylphosphino)thioanisole and its chalcogenide derivatives as ligands. Crystal structure of trans-[Me_2PtBr_2{o-Ph_2P(S)C_6H_2SMe-S,S'}-

摘要

The compound o-(diphenylphosphino)thioanisole can be oxidized by S or Se in benzene leading to the derivatives Ph_2P(E)C_6H_4SMe [EPSMe; E =S (1) Se (2)]. These compounds act as bidentate chelate ligands in reactions with the platinum(IV) complex [Me_2PtBr_2]_n to form trans and cis isomers of the general formula [Me_2PtBr_2(L_2)][L_2 = SPSMe (3,4)' SePSMe(5,6)]. The reaction of the complex (Me_2PtBr_2]_n with the starting ligand Ph_2PC_6H_2SMe (PSMe) led to a reductive elimination affording the neutral complex [PtBr_2(PSMe)] (7). The structure of the complex [Me_2PtBr_2{o-Ph_2P(S)C_6H_2SMe}] was established by X-ray crystallography. The platinum atoms has a distorted octahedral coordination and it is bonded to two methyl carbons, two bromide atoms and two sulfur atoms of the (o-diphenylphosphinesulfide)thioanisole bidentate ligand.