title: Mononuclear Platinum(II) and Palladium(II) Dithiolate Complexes as Chelate Metalloligands for Preparation of Heterobimetallic d(8)-d(8) Complexes.
abstract: Palladium-rhodium and platinum-rhodium heterobimetallic bridged dithiolate complexes of general formula [(P-P)M(&mgr;-S-S)Rh(COD)]ClO(4) (COD = 1,5-cyclooctadiene. For M = Pt: P-P = (PPh(3))(2) and S-S = EDT(2)(-) (1,2-ethanedithiolate) (1), PDT(2)(-) (1,3-propanedithiolate) (2), and BDT(2)(-) (1,4-buthanedithiolate) (3); P-P = dppb (1,4-bis(diphenylphosphino)butane) and S-S = EDT(2)(-) (4), PDT(2)(-) (5), and BDT(2)(-) (6); P-P = dppp (1,3-bis(diphenylphosphino)propane) and S-S = EDT(2)(-) (7), PDT(2)(-) (8), and BDT(2)(-) (9). For M = Pd: P-P = dppb and S-S = EDT(2)(-) (10), PDT(2)(-) (11), and BDT(2)(-) (12); P-P = dppp and S-S = EDT(2)(-) (13), PDT(2)(-) (14), and BDT(2)(-) (15)) have been prepared. The crystal structures for complexes 1-3, 6, 9, and 12 have been determined, and hinged structures were found with angles between local coordination planes MS(2)Rh ranging from 111.27 degrees for complex 1 to 151.34 degrees for complex 3. Metal-metal distances show nonbonding interactions between metals. X-ray data for 1: triclinic, P&onemacr;, a = 11.311(6) Å, b = 12.991(6) Å, c = 16.140(6) Å, alpha = 84.86(6) degrees, beta = 75.73(6) degrees, gamma = 86.43(6) degrees, Z = 2, R = 0.0427 (R(w) = 0.1151). X-ray data for 2: triclinic, P&onemacr;, a = 11.084(5) Å, b = 13.094(6) Å, c = 16.338(6) Å, alpha = 86.06(6) degrees, beta = 75.67(6) degrees, gamma = 88.55(6) degrees, Z = 2, R = 0.0470 (R(w) = 0.1264). X-ray data for 3: orthorhombic, Pbca, a = 14.439(6) Å, b = 19.807(6) Å, c = 38.156(6) Å, Z = 8, R = 0.0864 (R(w) = 0.2457). X-ray data for 6: monoclinic, P2(1)/c, a = 20.338(6) Å, b = 14.227(6) Å, c = 14.570(6) Å, beta = 100.94(6) degrees, Z = 4, R = 0.0536 (R(w) = 0.1449). X-ray data for 9: monoclinic, P2(1)/c, a = 20.326(6) Å, b = 14.109(6) Å, c = 14.368(6) Å, beta = 100.90(6) degrees, Z = 4, R = 0.0380 (R(w) = 0.0990). X-ray data for 12: monoclinic, P2(1)/c, a = 20.365(6) Å, b = 14.186(6) Å, c = 14.592(6) Å, beta = 101.04(6) degrees, Z = 4, R = 0.0507 (R(w) = 0.1500).
authors.affiliation: Departament de Química, Universitat Rovira i Virgili, Pl. Imperial Tarraco, 1, 43005 Tarragona, Spain, and Department of Chemistry, The University of Reading, Whiteknights, P.O. Box 224, Reading RG6 6AD, U.K.
authors.forename: Jorge
authors.initials: J
authors.lastname: Forniés-Cámer
authors.forename: Anna M.
authors.initials: AM
authors.lastname: Masdeu-Bultó
authors.forename: Carmen
authors.initials: C
authors.lastname: Claver
authors.forename: Christine J.
authors.initials: CJ
authors.lastname: Cardin