在许多复杂的分子中,一些基团(取代基)的作用相当于一个原子的行为,因此,在复杂的体系中,通常采用基团电负性的慨念。基团电负性在研究有机化合物的结构和性质中是一个重要的参数。人们在这方面已做了许多工作,文献中报导的基团电负性值不少于十套。本文试以核磁共振谱的质子化学位移值为依据,建立一套基于实验数据的基团电负性值。 In many complex molecules, some of the groups (substituents) act as one atom, so the concept of group electronegativity is often used in complex systems. Group electronegativity is an important parameter in the study of the structure and properties of organic compounds. People have done a lot of work in this area, the literature reported in the group of electronegativity of not less than ten sets. Based on the values ​​of proton chemical shifts of NMR spectra, a set of electronegativity values ​​based on experimental data was established.