气态三氧化硫的分子结构探讨  

Study on Molecular Structure of Gaseous Sulfur Trioxide

作　　者：童吉灶[1] 付清秀[1] 

机构地区：[1]上饶师范学院,江西上饶334001

出　　处：《上饶师范学院学报》2011年第3期63-67,共5页Journal of Shangrao Normal University

摘　　要：三氧化硫是最常见的无机化合物之一,气态三氧化硫,分子式为SO3,其空间构型为平面正三角形,属D3h对称群,这与用价层电子对互斥理论(VSEPR)所预测的结论是一致的。但现有文献上运用现代价键理论和分子轨道理论对气态三氧化硫分子结构的各种解释,都存在诸多缺陷和不足。本文尝试运用现代价键理论和分子轨道理论对气态三氧化硫的分子结构进行初步的探讨,进而提出一种较为简单易懂的关于气态三氧化硫分子结构的解释。Sulfur trioxide（SO3） is one of the most common inorganic compounds.It is a planar equilateral triangle molecule,with D3h symmetry group.The configuration can be explained by Valence Shell Electron Pairs Repulsion Theory（VSEPR）.There are several explanations for the molecule structure of gaseous SO3 according to the Modern Valence Bond Theory and Molecule Orbital Theory.Unfortunately,all of these explanations may be not perfect.So,in this paper,the text discussed more about the molecule structure of the gaseous SO3 by using modern valence bond theory and molecular orbital theory.And then,a simply explanation easy to understand for the molecule structure of the gaseous SO3 had been given.

关 键 词：三氧化硫 分子结构 离域Π键 现代价键理论 分子轨道理论 

分 类 号：O613.5[理学—无机化学]