二氢杨梅素分子结构与性质的密度泛函理论研究

被引:2
|
作者
辛国鹏 [1 ]
毛敏 [1 ]
刘信平 [1 ]
马文涛 [1 ]
马杰 [1 ]
张煜 [1 ]
机构
[1] 湖北民族大学化学与环境工程学院
关键词
二氢杨梅素; 密度泛函理论; 反应活性位点; 量子化学计算;
D O I
10.19855/j.1000-0364.2025.011005
中图分类号
TQ28 [天然有机化合物的生产];
学科分类号
0817 ;
摘要
本文基于密度泛函理论(DFT),采用B3LYP泛函结合6-31G基组上对二氢杨梅素的分子几何结构进行了优化,在此基础上以水为溶剂计算二氢杨梅素分子的活性位点以及红外光谱进行分析.静电势结果表明二氢杨梅素的亲核活性位点位于酚羟基氢原子(H23)附近;而亲电活性位点位于氧原子(O32)及其附近.前线分子轨道研究结果表明二氢杨梅素分子的最高占据轨道(HOMO)都位于酮基氧(O32)和羟基氧(O20)附近,说明这些位点易与亲电试剂反应.而最低空轨道(LUMO)位于碳原子(C12、C13、C14)区域,表明这些区域可与亲核试剂反应.简缩福井函数(f)结果证实了位于C-O-C键中的氧原子的f-值的亲电活性较其他位点氧原子大;而位于C8碳原子的f+值较大,因此该位点亲核活性较强.通过理论计算所得到的二氢杨梅素的红外光谱数据与实验所得到的红外光谱数据相差不大,这就说明理论计算结果是较为可靠的.从而为实验和理论研究二氢杨梅素结构与性质的关系提供了一定的理论参考.
引用
收藏
页码:35 / 40
页数:6
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