含特征M=N双键的前过渡金属末端氮宾配合物是一类重要的金属配合物。一些国际知名的金属有机化学家,如美国加州大学Berkeley分校的Bergman R G和麻省理工学院的Schrock R R等,投身于IVB族和VB族金属末端氮宾配合物的研究,并取得了重要进展。然而稀土金属(IIIB族)末端氮宾配合物却长期缺失。相比于IVB族和VB族金属离子,稀土金属离子的d轨道能级和氮宾配体的p轨道能级匹配性差,稀土金属=氮双键很不稳 The transition metal-terminated nitrogen-containing complex with the characteristic M = N double bond is an important class of metal complexes. Some internationally renowned metalloorganic chemists, such as Bergman R G from Berkeley University and Schrock R R from MIT, have made great progress in the study of metal-bound nitrogen-binding boron (IVB) and (VB) metal complexes. However, the rare earth metal (Group IIIB) terminal nitrene complex has been permanently absent. Compared with the IVB and VB metal ions, the d orbital energy level of the rare earth metal ions is poorly matched with the p orbital energy level of the nitrogen guest ligand, and the rare earth metal = nitrogen double bond is unstable