Synthesis and characterization of mono- and tri-nuclear ruthenium complexes of 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl and their catalytic activity

摘要: The Structures of ruthenium(II) complexes formed in solution from [RuX{(S)-binap}(arene)]Y (S)-3(X, Y = halide and/or BF4–; binap 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl; arene benzene or p-cymene) depend on the solvent. In acetonitrile–methanol (1 : 1) dicationic [Ru{(S)-binap}(MeCN)4]X(Y)(S)-4(X Cl a; X Cl, BF4b; Br c; I d) are predominantly formed, while monocationic species [RuX{(S)-binap}(MeCN)3]X (S)-6(X a, b c) were observed acetonitrile. These mono- and di-cationic could not be isolated pure, [RuCl2{(S)-binap}(MeCN)2](S)-5 was (S)-4a (S)-6a upon concentration reaction mixture. methanol without donor molecules such as acetonitrile, cationic trinuclear [Ru3X5{(S)-binap}3]Y (S)-7(X BF4b exclusively by heating at 60 °C UV irradiation a (S)-3. structure (S)-7 characterized spectral data an X-ray crystallographic analysis (S)-7b[orthorhombic, space group P212121, a= 26.328(5), b= 18.140(3), c= 26.374(4), Z= 4, R′= 0.083]. relationship between RuII(binap) their catalytic activities for asymmetric hydrogenation methyl 3-oxobutanoate has been investigated.