Bonding and Reactivity in the Electronically Unsaturated Hydrogen-Bridged Dimer [Ru3(CO)8(μ3-CMe)(μ-H)2(μ3-H)]2

The electronically unsaturated complex [Ru3(CO)8(μ3-CMe)­(μ-H)2(μ3-H)]2 (1), viewed as a dimer of the 46-electron fragment Ru3(CO)8(μ3-CMe)­(μ-H)3, is held together by delocalized bonding involving two triply bridging hydride ligands. Compound 1 exhibits a dynamic activity in solution that equilibrates two of the three types of hydride ligands. Compound 1 reacts with 1,1-bis­(diphenylphosphino)­methane to form the macrocyclic complex [Ru3(CO)7(μ3-CMe)­(μ-H)3]2(μ-dppm)2 (3).电子不饱和配合物[Ru₃(CO)₈(μ₃-CMe)(μ-H)₂(μ₃-H)]₂（记为化合物1）可被视作46电子片段Ru₃(CO)₈(μ₃-CMe)(μ-H)₃的二聚体，其依靠涉及两个三桥连氢配体的离域键合作用形成二聚结构。化合物1在溶液中展现出动态行为，可使三种氢配体中的两种达成配位平衡。化合物1与1,1-双(二苯基膦)甲烷（dppm）发生反应，生成大环配合物[Ru₃(CO)₇(μ₃-CMe)(μ-H)₃]₂(μ-dppm)₂（记为化合物3）。