摘要:
Reaction of cis-1,4-dichlorobut-2-ene with dicyclohexylphosphine in the presence of KI in acetone produces [cis-Cy2PHCH2CH = CHCH2PHCy2]I-2 which is converted to cis-Cy2PCH2CH = CHCH2PCy2 on treatment with NaOH. Reactions of cis-Cy2PCH2CH = CHCH2PCy2 With MHCl(CO)(PPh3)(3) (M = Ru, Os) yield MHCl(CO)(PPh3)(Cy2PCH2CH = CHCH2PCy2). The ruthenium complex RuCl(CO)(PPh3)(Cy2PCH2CH(CH2)(2)PCy2) is obtained by refluxing RuHCl(CO)(PPh3)(Cy2PCH2CH = CHCH2PCy2) in methanol-CH2Cl2. Reaction of RuCl(CO)(PPh3)(Cy2PCH2CH(CH2)(2)PCy2) with H-2 in the presence of NaBPh4 produces RuHCl(CO)(PPh3)(Cy-P(CH2)(4)PCy2). Reaction of OsCl(PPh3)(2,6-(Ph2PCH2)(2)C6H3) with H-3 produces OsCl(H...H)(PPh3)(2,6-(Ph2PCH2)(2)C6H3) which contains an elongated dihydrogen ligand. (C) 2002 Elsevier Science B.V. All rights reserved.