基团(取代基)电负性在研究复杂分子特别是有机化合物的结构和性质中是一个重要参数。人们在这方面已作了许多工作,文献报道的基团电负性值不少于十套。但这些方法大都太繁,公式复杂且参数较多,不便运用。本文试以核磁共振谱的质子化学位移值为依据,建立一个简单的计算公式。人们熟知,核磁共振谱中的质子化学位移与围绕质子的电子密度相关,而质子周围的电子密度又与邻近的取代基的基团电负性紧密相关。电负性大的基团 Electronegativity of groups (substituents) is an important parameter in the study of the structure and properties of complex molecules, especially organic compounds. People have done a lot of work in this regard, the reported value of the group electronegativity of not less than ten sets. However, most of these methods are too complicated, the formula is complex and more parameters, inconvenience to use. In this paper, the proton chemical shift NMR spectroscopy based on the value of the establishment of a simple formula. It is well known that the proton chemical shifts in nuclear magnetic resonance spectra are related to the electron density around the protons and that the electron density around the protons is in turn closely related to the group electronegativity of the adjacent substituents. Electronegativity of the group