摘要
在MP2/6-311++G**水平上,研究了5种复合物的几何结构型和成键特征,对能量、自然键轨道和分子中的原子进行了分析.结果表明:当锂取代3位置时,锂的电子性质突出,体系的偶极矩增加,锂的离子性质增强,通过体系共轭作用,增加了端基氧的电负性,氧的电负性质增强使得氧的给电子能力增强;当锂取代1和2位置时,锂与双键形成π-Li键或者锂与氧形成六元环结构.光谱分析表明:锂取代3位置时,红外光谱发生红移;当锂取代1和2位置时,由于锂的离子性很强,光谱发生蓝移.
The structures and properties of four Li-ketenes-water complexes has been fully studyed at the MP2/6-311++G(d,p)level.By studying the energy,nature bond orbital and atom-in molecules,the property of different Li-ketenes-water complexes has been discovered.When the Li at C3,the ironic of Li increased the dipole moments of Li-ketenes-water complexes.This property effects the electron density of oxygen in the ketene and the interaction between Li-ketenes and water.When the Li at C1 or C2,theπ-Li bond or the six-atom-ring formed,these structure are prefer to the Li-bonding interation.The calculated vibrational frequencies of Li-ketenes-water complexes indicate that the red shifts are related to the C3,and the blue shift to the C1 and C2.
出处
《东北师大学报(自然科学版)》
CAS
CSCD
北大核心
2015年第4期102-105,共4页
Journal of Northeast Normal University(Natural Science Edition)
基金
国家自然科学基金资助项目(20993149)
关键词
自然键轨道理论
分子中的原子理论
量子化学
natural bond orbital theory
atom-in-molecules theory
quantum chemistry