G. Tsiavaliaris et al., New bifunctional chelating phosphine ligands for immobilization of metal complexes on oxidic supports, SYNLETT, (3), 2001, pp. 391-393
The immobilization of transition metal complexes by bifunctional phosphines
containing ethoxysilane groups is of widespread interest. Especially desir
able are chelating phosphines, since they can reduce leaching of the metal
complexes. Easy syntheses of the bifunctional chelating ethoxysilane phosph
ines Ph2PCH2CH[OSi(OEt)(3)]CH2PPh2, and Ph2P(CH2)(x)P- Ph(CH2)(y)Si(OEt)(3)
(x = 2, 3: y = 2, 3), and the nickel derivative (CO)(2)Ni[Ph2P(CH2)(2)PPh(
CH2)(2)Si(OEt)(3)] are reported. The ethoxysilane groups present convenient
handles for immobilization on oxidic supports.