Angew.Chem.Int.Ed.2015,54,12640~12644低配位过渡金属配合物因其在小分子活化和单分子磁性方面的潜在价值而获得研究者的广泛关注.已知金属配合物的最低配位数是两配位,其中金属-配体多为σ-单键.最近,中国科学院上海有机化学研究所邓亮课题组采用大位阻的氮杂环卡宾和大位阻芳基亚胺基为配体实现了两配位钴-亚胺基配合物的合成.该配合物是首例含钴-主族元素多重键的两配位配合物.单晶X射线衍射、核磁氢谱、溶液相磁矩、理论计算等表明化合物自旋基态S=3/2.这一高自旋低配位钴亚胺基配合物可与一氧化碳作用发生乃春转移反应生成异氰酸酯,与乙烯反应生成乙醛亚胺,与 Angew.Chem.Int.Ed.2015,54,12640 ~ 12644 Low-coordination transition metal complexes have drawn the attention of researchers due to their potential value in small molecule activation and single-molecule magnetism. The lowest coordination number is the two coordination, in which the metal - ligand mostly σ-single bond Recently, the Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences Deng Liang group using sterically hindered nitrogen heterocyclic carbene and a large hindered aryl Asia Amino groups are ligands to realize the synthesis of two coordination cobalt - imine complexes, which are the first two coordination complexes containing multiple cobalt - main group elements. Single crystal X - ray diffraction, 1H - NMR , The solution phase magnetic moment, theoretical calculations show that the compound spin-state S = 3 / 2. This high spin low coordination cobalt imine complex with the role of carbon monoxide is spring transfer reaction generated isocyanate, and ethylene reaction of acetaldehyde Imine, with