A Useful Access to the Chemistry of the Indenyl-Osmium-Triisopropylphosphine Moiety
摘要:
Complex OsH3Cl(PiPr(3))(2) (1) reacts with indenyllithium to give OsH(eta(5)-C9H7)(PiPr(3))(2) (2), which affords [OsH(eta(5)-C9H7)]CH2CH(CH3)(PPr2)-Pr-i](PPr3)]OTf (3) by treatment with methyl trifluoromethanesulfonate. In acetonitrile, complex 3 evolves to an equilibrium mixture of the acetonitrile adducts [Os(eta(5)-C9H7)(NCCH3)-((PPr3)-Pr-i)(2)] OTf (4) and [Os(eta(5)-C9H7)(NCCH3)(2)(PPr3)]OTf (5). The addition of 2,5-norbornadiene (NBD) to this mixture leads to [OS(eta(5)-C9H7)(eta(4)-NBD)(PiPr(3))]OTf (6). Complex 2 also reacts with 12 and HBF4, to give [OsHI(eta(5)-C9H7)((PPr3)-Pr-i)(2)]I (7) and [OsH2(eta(5)-C9H7)(PiPr(3))(2)]BF4 (8), respectively.