前言一直到量子力学出现以前,化学键底有根据的物理理论是不存在的。但是,化学家们,基於实验材料底分析和概括,卻颇为接近於对分子构造及其化学性的正确了解了。在俄国古典化学学派底工作里,我们可以找到波特列洛夫构造理论底基础,门德列也夫关於原子底性质对分子底化学性的影响的有用的思想,马尔考夫尼考夫关於化学化合物中原子底互相影响的思想, Foreword Until the appearance of quantum mechanics, there was no physical theory underlying the chemical bond. However, chemists, based on experimental material analysis and generalization, are quite close to the correct understanding of the molecular structure and its chemistry. In the work of the Russian classical chemistry school, we find the basis of the theory of Porterlof’s structure, and Mendeleev’s useful thought about the influence of the nature of the atom on the chemistry of the molecule. Markov, The chemical compounds in the atomic bottom affect each other’s ideas,