Synthesis and characterization of new dimethylplatinum(IV) complexes with O-(diphenylphosphino)thioanisole and its chalcogenide derivatives as ligands.: Crystal structure of <i>trans</i>-[Me<sub>2</sub>PtBr<sub>2</sub>{O-Ph<sub>2</sub>P(S)C<sub>6</sub>H<sub>4</sub>SMe-S,S'}]
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2001
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Abstract
The compound o-(diphenylphosphino)thioanisole can be oxidized by S or Se in benzene leading to the derivatives Ph2P(E)C6H4SMe [EPSMe: E = S (1), Se (2)]. These compounds act as bidentate chelate ligands in reactions with the platinum(IV) complex [Me2PtBr2](n) to form trans and cis isomers of the general formula [Me2PtBr2(L-2)] [L-2 = SPSMe (3, 4); SePSMe (5, 6)]. The reaction of the complex [Me2PtBr2](n) with the starting ligand Ph2PC6H4SMe (PSMe) led to a reductive elimination affording the neutral complex [PtBr2(PSMe)] (7). The structure of the complex [Me2PtBr2{o-Ph2P(S)C6H4SMe}] was established by X-ray crystallography. The platinum atom 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. (C) 2001 Elsevier Science Ltd. Ail rights reserved.
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platinum, phosphino-thioether complexes, dimethylplatinum(IV) complexes, reductive elimination reaction, dichalcogenide complexes