Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200438, P. R. China.
Dalton Trans. 2018 Jul 17;47(28):9442-9452. doi: 10.1039/c8dt02212g.
A series of bimetallic and trimetallic complexes has been prepared by N-alkylation of mononuclear half-sandwich rhodium and iridium di-NHC complexes featuring bidentate chelate ligands composed of a classical NHC and a C-azolato donor. The shape and the separation between metal centers in the obtained complexes are highly dependent on the alkylating agent used. While the polynuclear complexes were formed as diastereomeric mixtures according to NMR spectroscopy, X-ray diffraction analysis revealed their remarkable preference to crystallize as meso compounds. The reactivity of the bimetallic, olefin-bridged complexes in electrophilic addition reactions has been investigated.
已经通过单核半夹心铑和铱双 NHC 配合物的 N-烷基化制备了一系列双金属和三金属配合物，这些配合物具有由经典 NHC 和 C-唑基供体组成的双齿螯合配体。所得配合物中金属中心的形状和分离高度依赖于所用的烷基化试剂。虽然多核配合物根据 NMR 光谱形成非对映异构体混合物，但 X 射线衍射分析表明它们结晶为内消旋化合物的显著偏好。还研究了双金属、烯烃桥连配合物在亲电加成反应中的反应性。
