The New Substituent Constants in the Excited States

[摘要] The new substituent constants (�?*) are calculated from the acidity constants (pK*) of phenol derivatives in the excited state (1Lb). These substituent constant are applied to the Hammett equations and found good correlation with pK* of 2,6-di-tert-butyl phenol, benzamide, nitroaniline, thiophenol, azobenzene, and benzoic acid derivatives. The correlation was much better than that of ground state substituent constants such as �?, �?+, and �?-. From these results, the new substituent constants (�?*) are proposed to be used for the linear free energy relationship in the 1(�?,�?*) excited states of phenyl compounds.

[学科分类] 化学（综合）