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本文采用Barthelat有效势价电子从头计算法,对二氯二茂锆络合物的电子结构进行了计算。计算结果表明:(1)络合物的HOMO能量的为-0.38409028(hartrees),主要是由二个氯配位体的P_z轨道构成;LUMO的能量为0.00749724(hartrees),主要是由中心金属Zr原子的d_(xy)和d_(xz)轨道构成;(2)电荷分布情况为:Zr+1.7821,Cl(1)和Cl(2)均匀-0.3966,Cp(1)和Cp(2)均为-0.4944;(3)键级为:Zr—Cl0.3103,Zr—Cp—0.1942。
In this paper, Barthelat effective potential electron ab initio method was used to calculate the electronic structure of zirconium dichloride zirconocene complexes. The results show that: (1) The HOMO energy of the complex is -0.38409028 (hartrees), which is mainly composed of P_z orbitals of two chlorine ligands; the energy of LUMO is 0.00749724 (hartrees), mainly composed of the central metal Zr (2) The distribution of charge is: Zr + 1.7821, Cl (1) and Cl (2) are uniform -0.3966, Cp (1) and Cp (2) are both -0.4944; (3) Bonds: Zr-Cl0.3103, Zr-Cp-0.1942.