Precious metal-phosphine complexes for homogeneous catalysis: Synthesis and characterization of a complete series of Cp2Fe(PPh2)(2)MX2 (M = Pt, Pd; X= Cl, Br, I, Ph)

Cp2Fe(PPh2)(2) complexes of PdX2 (X = Cl Br) and PtX2 (X = Cl, Ur, I, Ph) h ave been synthesized in nearly quantitative yield with excellent purity by reacting the respective narbornadiene or 1,5-cyclooctadiene metal complexes with dppf. The palladium iodide complex, dppfPdI(2) has been isolated in 9 8 % yield by a 1:2 mole reaction of dppfPdCl(2) with NaI. Methods have been developed to isolate these complexes with and without the solvent (usually CH2Cl2) in the lattice. These compounds have bean characterized by element al, FTIR, multi-nuclear FTNMR and in some cases by single crystal X-Ray.