SYNTHESES OF PALLADIUM(II) COMPLEXES WITH THIOLATE AND PHOSPHINE-LIGANDS - X-RAY CRYSTAL-STRUCTURES OF [PD(TDT)(PPH(3))(2)]CENTER-DOT-C2H4CL2 AND [PD-2(HMP)(2)(PPH(3))(2)CL-2]

By the reactions of Pd2+, 1,1-dithiolate [SC6H3(CH3S2-, SCH2CH2S2- or SCH2CH (CH3S2-] Or thiolate (HOC6H4S-) and PR(3) (R = Ph, Et) in MeOH, the complexes [Pd(tdt)(PPh(3))(2)] (1), [Pd-2(edt)(2)(PPh(3))(2)] (2) , [Pd-2(pdt)(2)(PPh(3))(2)] (3), [Pd-2(edt)(2)(PEt(3))(2)] (4), [Pd-2( pdt)(2)(PEt(3))(2)] (5), [Pd-2(Hmp)(2)(PPh(3))(2)Cl-2] (6) and [Pd-2(t dt)(2)(PEt(3))(2)] (7) (tdt = 1,2-toluenedithiolate, edt = 1,2-ethaned ithiol, pdt = 1,2-propanedithiol and mp = mercaptophenol) were prepare d and analysed by X-ray diffraction. All palladium atoms are tetra-coo rdinated with distorted square-planar geometry of phosphorus and/or su lfur atoms. The reaction mechanism of Pd2+, 1,2-dithiolate and PR(3) ( R = Et, Ph) is discussed. Copyright (C) 1996 Elsevier Science Ltd