有机试剂结构与性质的研究──Ⅻ．有机试剂的pK_a与改进的Hammett方程

Study on structure and properties of organic reagents──Ⅻ pKa of organic reagents and modified Hammett equation

有机试剂的ｐＫａ是其重要的物化参数，是有机试剂酸碱性的度量，直接决定配合物的稳定性。应用改进的Ｈａｍｒｎｅｔｔ方程处理取代基常数与ｐＫａ的关系，得到满意的结果。

pKa, acid dissociation constant of organic reagents.is an important parameter to represent the acidity and stability of their complexes in solution. The correlation between pKa and substituent constants of organic reagents has been studied by using modified Hamrnett equation and its slightly simplified form. The results are sans factory.