论文部分内容阅读
有机功能团的相对电负性问题,许多学者作了不少的工作,他们从不同的角度提出了估算功能团相对电负性的方法。有人从质子磁共振(PMR)的化学位移参数计算功能团的相对电负性。B.P.Dailey等人以CH_3CH_2X(X=F、Cl、Br、I)化合物为标准,由卤素的电负性与相应的CH_3CH_2—中氢原子的化学位移间的线性关系导出了一个测定CH_3CH_2—X系列化合物中X功能团相对电负性(x_X)的经验公式。
Many scholars have done a lot of work on the relative electronegativity of organic functional groups. They proposed methods of estimating the relative electronegativity of functional groups from different perspectives. Some people calculate the relative electronegativity of functional groups from the chemical shift parameters of proton magnetic resonance (PMR). Based on the linear relationship between the electronegativity of halogen and the chemical shift of the corresponding CH 3 CH 2 -hydrogen atom, BP Dailey et al. (CH_3CH_2X (X = F, Cl, Br, I) Empirical formula of relative electronegativity (x_X) of X functional group in a compound.