Phosphine tris -, platinum

C,H2iP, Phosphine, triisopropyl-, platinum complex, 28 120, 135 rhodium complex, 27 292 tungsten complex, 27 7 C,H27PSij, Phosphine, tris(trimethylsilyl)-, 27 243... 

More recently, Atwood et al. developed a platinum complex of a water-soluble, bidentate phosphine ligand, cA-(TPPTS)2PtCl2 [TPPTS = tris(sodium m -benzenesuI onatc)phosphi nc, as an effective hydration... 

The first examples of five-coordinate platinum(II) complexes of the type [Pt(PR3)L]2+ (L = tris(2-(diphenylphosphino)ethyl)phosphine R = Et, OMe, OEt) (104) containing only P-donor atoms have been prepared by the reaction of [PtClL]+ with an appropriate monodentate tertiary phosphine or phosphite ligand.284 Triaryl phosphines and phosphites do not react with the precursor complex, even at elevated temperatures, most probably due to the considerable steric interactions that would occur upon the approach of the P-donor ligand to the platinum(II) center. 

Hoye, P.A.T., Pringle, P.G., Smith, M.B., and Worboys, K., Hydrophosphination of formaldehyde catalyzed by tris(hydroxymethyl)phosphine complexes of platinum, /. Chem. Soc., Dalton Trans., 269, 1993. 

Phosphines and arsines containing more than one olefinic group were neglected as possible multidentate ligands until Hall prepared the tris (orfAo-vinylphenyl) derivatives of phosphorus, arsenic and antimony (tvpp, tvpa and tvps) and their platinum(II) (48) and rhodium(I) (49) complexes. 

Phosphonium (and quasi-phosphonium) salts generate phosphines under electrolytic reduction (Table 7). Mercury, lead, platinum, tin, copper and aluminium172 cathodes were tried, mercury being the most often used173. Product dependence on cathode material, current, density and solvent has been observed174. In the case of unsymmetrical... 

When [Pd(COD)Cl2] was treated with two equivalents of the tris(p-alkylaryl) phosphines, PAr3, trans-[Pd(PAr3)2Cl2] complexes were formed. Apart from their trans geometry they were very similar to their platinum(II) analogues, although less crystalline so that purifica-... 

The platinum complex 171 easily reacts with excess of phenylacetylene with the formation of a 1 1 mixture of 1,4-digermacyclohexa-2,5-diene and (//-ace ty I ene)bis(tri phenyl phosphine (platinum in quantitative yields (Equation 4)... 

Unsuccessful attempts to prepare stable complexes of six-membered ring allenes that succeeded for their seven-membered counterparts (Section IV,C) include reaction of 299 with KOt-Bu in the presence of tris(triphenyl-phosphine)platinum(O) [Eq. (50)]118 and abstraction of methoxy from 301 (Scheme 37)119120 (L = CO) with trimethylsilyl triflate. The latter gave products suggestive of an intermediate complex of 1,2-cyclohexadiene, but it could not be detected or trapped. Based on fluxionality studies in the seven-membered counterpart (Section IV,C), equilibration of 302 with a... 

---