Perhalophenyl complexes of palladium(II) containing keto-stabilized phosphorus ylides of the type Ph2P(CH2)nPPh2CHC(O)R

Article abstract of DOI:10.1016/0022-328X(87)80101-8

From suitable perhalophenyl derivatives of palladium(II), viz.: Pd(C6F5)2(SC4H8)2, 2(NBu4)2, 2 (X=F, Cl, X'+Cl, Br), new complexes of various types have been prepared, viz.: trans-Pd(C6F5)2(Y)2, Pd(C6X5)2(Y), PdCl(C6X5)(Y) (X=F, Cl).The neutral ligand Y is a keto-stabilized phosphorus ylide of the type Ph2P(CH2)nPPh2CHC(O)R (n=1, R=CH3, C6H5; n=2, R=C6H5) acting in a terminal monodentate P-donor or a bidentate chelate P,C-donor mode.The reaction of PdCl(C6F5)(Y) complexes with HCl leads to the corresponding PdCl2(C6F5)(YH) complexes in which the phosphonium cation ⁺ behaves as monodentate P-donor at its phosphinic end.IR and 31P NMR spectroscopy were used to decide the coordination mode of the ligands and, in some cases, to reveal the presence of two isomers.