850644-35-8Relevant academic research and scientific papers
Organoplatinum(II) complexes with phosphite ligands
Esmaeilbeig, Ahmad R.,Samouei, Hamid R.,Rashidi, Mehdi
, p. 2519 - 2526 (2008/09/20)
The phosphite complexes cis-[PtMe2L(SMe2)] in which L = P(OiPr)3, 1a, or L = P(OPh)3, 1b, were synthesized by the reaction of cis,cis-[Me2Pt(μ-SMe2)2PtMe2] with 2 equiv. of L. If 4 equiv. of L was used the bis-phosphite complexes cis-[PtMe2L2] in which L = P(OiPr)3, 2a, or L = P(OPh)3, 2b, were obtained. The reaction of cis-[Pt(p-MeC6H4)2(SMe2)2] with 2 equiv. of L gave the aryl bis-phosphite complexes cis-[Pt(p-MeC6H4)2L2] in which L = P(OiPr)3, 2a′, or L = P(OPh)3, 2b′. Use of 1 equiv. of L in the latter reaction gave the bis-phosphite complex along with the starting complex in a 1:1 ratio. The complexes failed to react with MeI. The reaction of cis,cis-[Me2Pt(μ-SMe2)2PtMe2] with 2 equiv. of the phosphine PPh3 gave cis-[PtMe2(PPh3)2] and cis-[PtMe2(PPh3)(SMe2)] along with unreacted starting material. Reaction of cis-[PtMe2L(SMe2)], 1a and 1b with the bidentate phosphine ligand bis(diphenylphosphino)methane, dppm = Ph2PCH2PPh2, gave [PtMe2(dppm)], 8, along with cis-[PtMe2L2], 2. The reaction of cis-[PtMe2L(SMe2)] with 1/2 equiv. of the bidentate N-donor ligand NN = 4,4′-bipyridine yielded the binuclear complexes [PtMe2L(μ-NN)PtMe2L] in which L = P(OiPr)3, 3a, or L = P(OPh)3, 3b. The complexes were fully characterized using multinuclear NMR (1H, 13C, 31P, and 195Pt) spectroscopy.
Binuclear dimethylplatinum (II) complexes each containing monodentate phosphine ligands and a bridging diphosphine ligand X(PPh2) 2, X = CH2 or NH. Molecular structure of cis,cis-[Me 2(pyPh2P)Pt(μ-Ph2PNHPPh2) Pt(PPh2py) Me2]·2CH2Cl2
Rashidi, Mehdi,Kamali, Katayoon,Jennings, Michael C.,Puddephatt, Richard J.
, p. 1600 - 1605 (2007/10/03)
Displacement of the labile bridging SMe2 ligand in the organodiplatinum(II) complexes cis,cis-[Me2Pt(μ-SMe 2){μ-X(PPh2)2}PtMe2], in which X(PPh2)2 is either bis(diphenylphosphino)amine [dppa (X = NH)], 1a, or bis(diphenylphosphino)methane [dppm (X = CH2)], 1b, with 2 equiv of some monodentate phosphine ligands, L, gave a series of organodiplatinum(II) complexes with general formula cis,cis-[Me 2LPt(μ-dppa)PtLMe2][L = PPh3, 2a, PPh 2py(2-diphenylphosphinopyridine, PN), 3a, or P(O-iPr) 3, 4a] or cis,cis-[Me2LPt(μ-dppm)PtLMe2][L = PPh3, 2b, PN, 3b, or P(O-iPr)3, 4b] in good yields. In these complexes the two metallic centers are held together by only one bridging diphosphine ligand with no metal-metal bond. When L is PPh 2Me or PPhMe2, the diplatinum(II) complexes are split to the corresponding monomers, [PtMe2{X(PPh2)2}] and cis-[PtMe2L2]. No reaction was observed when L is pyridine or SMe2. The complexes were fully characterized using multinuclear NMR (1H, 13C, 31P and 195Pt) methods, and the structure of cis,cis-[Me 2(pyPh2P)Pt(μ-Ph2PNHPPh2) Pt(PPh2py)Me2]·2CH2Cl2, 3a, has been determined crystallographically.
