Browsing by Author "Moscoso, R"

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    Heterodinuclear PtRh and PtIr complexes with phosphinite groups as bridging ligands
    (1998) Contreras, R; Valderrama, M; Moscoso, R
    Compounds of the general formula [Pt(eta(2)-L) {P(O)Ph-2}{P(OH)Ph-2}], where eta(2)-L = {eta(2)-S2P(OEt)(2)}(-) (I) and {eta(2)-(SCNEt2)-C-2}(-) (2), react in THF solution with the dinuclear complex [{(cod)M(mu-OMe)}(2)] (M = Rh-I or Ir-I) to give new heterodinuclear compounds of the type [(eta(2)-L)Pt{mu-P(O)Ph-2}(2)M(cod)], where eta(2)-L = {eta(2)-S2P(OEt)(2)}(-); M = Rh-I (3), Ir-I (4) and eta(2)-L = {eta(2)-S2C-NEt2}(-); M = Rh-I (5) and Ir-I (6). Compounds (3) and (4) react with an excess of CO, leading to displacement of the coordinated pi-diolefin (cod) and the formation of the dicarbonyl derivatives [{eta(2)-S2P(OEt)(2)}Pt{mu-P(O)-Ph-2}(2)M(CO)(2)] [M = Rh-I (7), Ir-I (8)].
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    Platinum(II) complexes with dithiolates and phosphinites as ligands: Crystal structure of [Pt{S2CO}{P(OMe)Ph(2)}(2)]
    (PERGAMON-ELSEVIER SCIENCE LTD, 1996) Contreras, R; Valderrama, M; Riveros, O; Moscoso, R; Boys, D
    Reaction of the complex [PtCl{P(O)Ph(2)} {P(OH)Ph(2)}(2)] with silver or thallium derivatives of dithiolate ligands led to neutral complexes of general formula [Pt{S-S} {P(O)Ph(2)} {P(OH)Ph(2)}], where {S-S}(-) ={S(2)CNEt(2)}(-) (1), {S2P(OEt)2}(-) (2) and {S(2)COEt}(-) (3). Complexes 2 and 3 reacted with an excess of NaI in acetone solution by dealkylation of the coordinated dithiolate ligand and formation of the compounds [Pt{S2P(O) (OEt)} {P(O)Ph(2)} {P(OH)Ph(2)}] Na (4) and [Pt{S2CO}{P(O)Ph(2)}{P(OH)Ph(2)}] Na (5), respectively. The corresponding tetraphenylphosphonium derivatives (6, 7) were prepared by a metathetical reaction of these complexes with Ph(4)PBr in acetone solution. Related dithiolate complexes were obtained by reaction of the complex [Pt{S-S}(2)] with P(OMe)Ph(2) in molar ratio 1:2. Thus, the reaction of [Pt{S(2)COEt}(2)] in dichloromethane solution at room temperature gave [Pt{S(2)COEt} {P(OMe)Ph(2)}(2)] Cl (8). This complex reacted with NaI in acetone to form the neutral compound [Pt{S2CO} {P(OMe)Ph(2)}(2)] (9). When the reaction was carried out in dichloromethane at reflux temperature using [Pt{S2P(OEt)(2)}(2)] as starting material, the neutral compound [Pt{S2P(O)(OEt)} {P(OMe)Ph(2)}(2)] (10) was obtained. The crystal structure of the complex 9 has been determined by X-ray diffraction. The neutral complex shows a nearly square-planar coordination of the metal and a planar dithiocarbonate ligand.