一、前言 本文提出一个新的计算邻位二取代苯分子偶极矩公式。由于邻位取代基的相互作用,邻位二取代苯分子的偶极矩的计算应该是较复杂的,一些书的作者认为,苯分子为平面正六角形,两个邻位取代基间的夹角θ=60°,计算结果有相当一批化合物的偶极矩的值与实验值有较大偏差。如邻氯酚分子的偶极矩,实验值为1.319D,计算值 I. INTRODUCTION This paper presents a new formula for calculating the dipole moment of ortho-disubstituted benzene molecules. Due to the interaction of ortho-substituents, the calculation of the dipole moment of ortho-disubstituted benzene molecules should be more complex. Some authors believe that the benzene molecule is a plane regular hexagon and the angle between two adjacent substituents θ = 60 °, the calculation results have a considerable number of compounds dipole moment values ​​and experimental values ​​have a larger deviation. Such as o-chlorophenol molecular dipole moment, the experimental value of 1.319D, calculated value