The calculated mulliken atomic charges of carbon atoms and oxygen atom are used as the structural descriptors of PCDFs molecules.
采用G98W程序包中的PM3方法对135个多氯代二苯并呋喃(PCDFs)分子和二苯并呋喃进行了优化计算,作业命令为#pPM3optfreqscf(conver=9),以计算所得的碳、氧原子电荷作为PCDFs分子结构描述符,运用多元线性回归技术建立了对PCDFs的lgKow与原子电荷的七元方程,最优复相关系数为0。
Atomic charges are one of the most important concepts in quantum chemistry and are often used widely to understand and predict the physical and chemical properties.
分子中的原子电荷分布是量子化学的重要性质,在分子模拟、力场计算以及QSAR/QSPR的研究中都是非常重要的参数。