Synthesis, Characterization, and Acidity Properties of [MCl(H<sub>2</sub>)(L)(PMP)]BF<sub>4</sub> (M = Ru, L = PPh<sub>3</sub>, CO; M = Os, L = PPh<sub>3</sub>; PMP = 2,6-(Ph<sub>2</sub>PCH<sub>2</sub>)<sub>2</sub>C<sub>5</sub>H<sub>3</sub>N)
作者:Guochen Jia、Hon Man Lee、Ian D. Williams、Chak Po Lau、Yuzhong Chen
DOI:10.1021/om970207+
日期:1997.9.1
Treatment of RuCl2(PPh3)(3) with PMP (PMP = 2,6-(Ph2PCH2)(2)C5H3N) in acetone produced RuCl2(PPh3)(PMP), which has been characterized by X-ray diffraction. Treatment of RuCl2-(PPh3)(PMP) with NaBH4 in methanol gave RuHCl(PPh3)(PMP), acidification of which with HBF4 . Et2O produced the molecular dihydrogen complex [RuCl(H-2)(PPh3)(PMP)]BF4. Treatment of RuHCl(CO)(PPh3)(3) with PMP in benzene produced RuHCl(CO)(PMP), which reacted with HBF4 . Et2O to give the molecular dihydrogen complex [RuCl(H-2)(CO)(PMP)]BF4. The osmium molecular dihydrogen complex [OsCl(H-2)(PPh3)(PMP)]BF4 was prepared by protonation of OsHCl(PPh3)(PMP) with HBF4 . Et2O. Relative acidities of the dihydrogen complexes were investigated by NMR spectroscopy of equilibrium reactions conducted in CD2Cl2. [RuCl(H-2)(CO)(PMP)]BF4 is more acidic than [RuCl(H-2)(PPh3)(PMP)]BF4, which is in turn more acidic than its osmium analog [OsCl(H-2)(PPh3)(PMP)]BF4.
Abbenhuis, Rob A.T.M.; Del Rio, Ignacio; Bergshoef, Michel M., Inorganic Chemistry, 1998, vol. 37, # 8, p. 1749 - 1758
作者:Abbenhuis, Rob A.T.M.、Del Rio, Ignacio、Bergshoef, Michel M.、Boersma, Jaap、Veldman, Nora、Spek, Anthony L.、Van Koten, Gerard