金属有机化学中的配体,通常泛指那些在基态或反应中间态具有结构意义,或在能量上有明显作用的基团。因此Ct-H键特别是饱和C(sp~3)中心上的C-H键,通常被认为是化学惰性的。然而,80年代初,C-H基团与过渡金属(M)中心相互作用的研究表明,它们之间能形成二电子三中心键,并由此产生了对分子结构及电子结构明显的影响,进而影响了分子的化学反应性。 Ligands in metalorganic chemistry generally refer to those groups that have structural or energetic significance in the ground state or in the intermediate state of the reaction. Therefore C H bonds, especially the C-H bonds on the saturated C (sp ~ 3) centers, are generally considered to be chemically inert. However, studies on the interaction between CH groups and transition metal (M) centers in the early 1980s showed that they can form two electron-centered center bonds and thus have a significant effect on molecular structure and electronic structure, thereby affecting The molecular chemical reactivity.