ESR法研究龙胆酸在碱性溶液中的反应

本文用静态毛细管法研究了龙胆酸在醇钠-醇溶液中的反应,主要是氧化反应,发现了属于同一类型三种新的自由基物种,给出了它们的自由基结构模式;龙胆酸在氢氧化钠水溶液中的反应,不仅有氧化还有取代反应,氧化之后紧接着进行取代反应,本文都给予了解释。

ESR STUDY OF CHEMICAL REACTIONS OF GENTISIC ACID IN ALKALINE SOLUTIONS

A stetic capillary netied of ESR has been used to investigate the chemical re-actions of gentisic acid in different alkaline solutions. The ESR spectra of chemical reactions of gentisic acid in sodium alkoxide-alcohol were different from those in sodium hydroxide aqueous solution. The difference was given as follows: 1. The chemical reactions of gentisic acid in sodium alkoxide-alcohol solution were autcoxidation. Three new free radicals in the chemical reactions were found and theii structural models were given. 2. The chemical rearlions of gentistic acid in sodium hydroxide aqueous solu-ien are first autooxidation and then substitution. A new free radical in the dation step was found and its structural mode! was given3] In the substi-cittiea step the hydrogen(H) on the benzene ring of the gentisic acid was substi-sated by the hydroxyl group (OH) in the solution.