芳香烃含有环电流的理论,首先由Pauling在1936年对芳烃的抗磁各向异性进行研究中提出,次年由London应用LCAO分子轨道理论对π-电子的抗磁磁化率进行了计算。London的方法虽然用量子力学进行了计算,但是,只讨论了环电流对抗磁磁化率的影响,没有讨论到环电流本身。以后,Pople和McWeeny分别对London的计算法加以改进,用他 The theory of aromatics containing ring current was first proposed by Pauling in 1936 for studying the diamagnetic anisotropy of aromatics. In the following year, the anti-magnetic susceptibility of π-electrons was calculated by London using LCAO molecular orbital theory. The method of London has been calculated using quantum mechanics. However, only the effect of ring current on the magneto-susceptibility is discussed, and the ring current itself is not discussed. Later, Pople and McWeeny, respectively, to improve London’s calculation method, use him