| 摘要 |
Described is a carbonylation process using novel homogeneous trihydrocarbyl silyl-substituted alkyl diaryl phosphine transition metal complexes of the general formula: [(Ar2PQ)ySiR4-y]g(MXn)s wherein Ar is a C6 to C10 aromatic hydrocarbyl radical, Q is a C1 to C30 saturated straight chain divalent radical, R is a C1 to C10 hydrocarbyl, wherein Ar, Q and R, can be substituted or unsubstituted, y is 1 to 4, g times y is 1 to 6, M is a transition metal selected from the group consisting of Group VIII transition metals, X is an anion or organic ligand excluding halogen satisfying the valence and coordination sites of the metal, n is 2 to 6 and s is 1 to 3, are disclosed. These materials exhibit high thermal stability and are superior catalysts for the selective hydroformylation of olefins, particularly in the presence of excess quantities of ligand of the formula: (Ar2PQ)ySiR4-y wherein Ar, Q, R, and y are as previously defined. Specifically, tris-(trimethyl silyl-ethyl diphenyl phosphine) rhodium carbonyl hydride, [(CH3)3Si-CH2CH2-PPh2]3Rh(CO)H and tris [bis-(diphenylphosphinoethyl)dimethylsilane] rhodium carbonyl hydride, [(CH3)2Si-CH2CH2-PPh2]3Rh(CO)H, are selective olefin hydroformulation catalysts, particularly in the presence of excess trihydrocarbyl silyl-substituted alkyl diaryl phosphine ligand. |
