Cyclometallated platinum compounds with N-benzylidenebenzylamines bearing trifluoromethyl groups. Crystal structure of [PtMe}3-(CF3) C6H3CHNCH2Ph{(PPh3)]
摘要:
The reaction of [Pt2Me4(mu-SMe2)(2)] (1) with the imine 3-(CF3)C6H4CH=NCH2Ph (2a) yields the cyclometallated compound [PtMe{3-(CF3)C6H3CH=NCH2Ph}(SMe2)] (3a) by selective metallation at the less hindered of the two ortho positions of the aryl ring followed by loss of methane. A similar reaction for imine 2-(CF3)C6H4CH=NCH2Ph (2c) yieIds the cyclometallated compound [PtMe{2-(CF3)C6H3CH=NCH2Ph} (SMe2)] (3c). The reactions of these compounds with triphenylphosphine in (1 : 1) ratio produce compounds [PtMe{3-(CF3)C6H3CH=NCH2Ph}(PPh3)] (4a) and [PtMe{2-(CF3)C6H3CH=NCH2Ph}(PPh3)] (4c). The X-ray structure of 4a is reported. An excess of triphenylphosphine produces metallacycle cleavage and [PtMe{3-(CF3)C6H3CH=NCH2Ph} (PPh3)(2)] (5a) is formed with the imine acting as a [C-] unidentate ligand. Oxidative addition of methyl iodide to compounds 4a and 4c gives cyclometallated platinum(IV) complexes. Imines 3,5-(CF3)(2)C6H3CH=NCH2Ph (2b) and 2-F-6-(CF3)C6H3CH=NCH2Ph (2d) fail to react with [Pt2Me4(mu-SMe2)(2)] (1). (C) 1998 Elsevier Science Ltd. All rights reserved.
Cyclometallated platinum compounds with N-benzylidenebenzylamines bearing trifluoromethyl groups. Crystal structure of [PtMe}3-(CF3) C6H3CHNCH2Ph{(PPh3)]
摘要:
The reaction of [Pt2Me4(mu-SMe2)(2)] (1) with the imine 3-(CF3)C6H4CH=NCH2Ph (2a) yields the cyclometallated compound [PtMe{3-(CF3)C6H3CH=NCH2Ph}(SMe2)] (3a) by selective metallation at the less hindered of the two ortho positions of the aryl ring followed by loss of methane. A similar reaction for imine 2-(CF3)C6H4CH=NCH2Ph (2c) yieIds the cyclometallated compound [PtMe{2-(CF3)C6H3CH=NCH2Ph} (SMe2)] (3c). The reactions of these compounds with triphenylphosphine in (1 : 1) ratio produce compounds [PtMe{3-(CF3)C6H3CH=NCH2Ph}(PPh3)] (4a) and [PtMe{2-(CF3)C6H3CH=NCH2Ph}(PPh3)] (4c). The X-ray structure of 4a is reported. An excess of triphenylphosphine produces metallacycle cleavage and [PtMe{3-(CF3)C6H3CH=NCH2Ph} (PPh3)(2)] (5a) is formed with the imine acting as a [C-] unidentate ligand. Oxidative addition of methyl iodide to compounds 4a and 4c gives cyclometallated platinum(IV) complexes. Imines 3,5-(CF3)(2)C6H3CH=NCH2Ph (2b) and 2-F-6-(CF3)C6H3CH=NCH2Ph (2d) fail to react with [Pt2Me4(mu-SMe2)(2)] (1). (C) 1998 Elsevier Science Ltd. All rights reserved.