名称:
Activation of a CO bond by reaction of a tris(cyclopentadienyl)lanthanide complex with an alkali metal in dimethoxyethane (DME); crystal structures of [Ndη-C5H3(SiMe3)2-1,32(μ-OMe)2Li(DME)] and [{Ce(η-C5H3tBu2-1,3)2(μ-OMe)2]
摘要:
The reaction of [LnCp''(3)] [Ln = Ce, Cp'' = eta-C(5)H(3)(t)Bu(2)-1,3 or eta-C5H3(SiMe(3))(2)-1,3; or Ln = Nd and Cp'' = eta-C5H3(SiMe(3))(2)-1,3] with metallic lithium or potassium in dimethoxyethane (DME) at ambient temperature gave in high yield [{LnCp''(2)(mu-OMe)}(2)] [Ln = Ce and Cp'' = eta-C5H3(SiMe(3))(2)-1,3 (1) or eta-C(5)H(3)(t)Bu(2)-1,3 (2); or Ln = Nd and Cp'' = eta-C5H3(SiMe(3))(2)-1,3 (3)] or [NdCp''(2)(mu-OMe)(2)Li(DME)] (Cp'' = eta-C5H3(SiMe(3))(2)-1,3) (4). The crystal structures of complexes 2 and 4 are reported. Complex 4 is the first structurally characterized heterobimetallic lanthanocene-alkoxo-lithium.