摘要
以密度泛函理论表述的电负性定义及其均衡原理为基础,提出了一个修正电负性均衡方法(MEEM),可直接用于计算各类分子的总能量和原子电荷分布。通过对3个较大环状分子18-crown-6,24-crown-8和24-cryptand的实际计算,发现其计算结果与从头计算结果接近。
On the basis of electronegativity expressed in density functional theory and electronegativity equalization principle,the Modified Electronegativity Method(MEEM) has been developed,which allows the direct computations of the atomic charges and total energies in various molecules.As application,the three macrocyclic molecules 18-crown-6,24-crown-8 and 24-cryptand are calculated and quite good results of atomic charges and total energies are obtained as compared with those from the ab initio STO-3G SCF calculations.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第5期781-785,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
国家教育委员会博士点基金
关键词
密度泛函理论
电负性
电荷分布
环状大分子
Density functional theory,Electronegativity,Total energy of a molecule,Charge distribution,Macrocyclic molecule