摘要
运用密度泛函理论(DFT)的B3LYP方法在6-311++G**水平上,对基态分子的结构进行了优化计算,得到CS2分子的稳定结构为D∞h构型,电子态为X1Σ+,平衡核间距RCS=0.15605nm、离解能De=16.7959eV,用多体项展式理论推导了基态CS2分子的解析势能函数,其等值势能图准确再现了基态CS2分子的结构特征及其势阱深度与位置.
The density function (B3LYP) method has been used to optimize the possible ground-state structures of the CS2 molecule. The results show that the ground state of CS2 molecule has D∞h symmetry and is in the X1Σ+ state. The parameters of its structure are Rcs=0. 156 05 nm and De=16. 795 9 eV. The potential energy function of CS2 has been derived from the many-body expansion theory. The potential energy function correctly describes the configuration and the dissociation energy of the ground-state molecule.
出处
《西南大学学报(自然科学版)》
CAS
CSCD
北大核心
2009年第1期23-26,共4页
Journal of Southwest University(Natural Science Edition)
基金
国家自然科学基金资助项目(10574096)
高等学校博士学科点专项科研基金资助项目(20050610010)
贵州省教育厅自然科学基金资助项目(2005105)
关键词
分子结构
解析势能函数
多体项展式理论
molecular structure
analytic potential energy function
many-body expansion theory