キノン類および酸ヒドラジド類の定性分析

概要

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Benzoic acid hydrazide and isonicotinic acid hydrazide react with naphthoquinones in an alkaline solution to form red 1, 2-naphthoquinone derivatives and blue 1, 4-naphthoquinone derivatives. This is useful for the classification of quinones, and also for their microdetermination. In the analysis of acid hydrazides, furthermore, α-unsubstituted hydrazides can be identified by the color reaction in an alkaline solution with 1, 4-naphthoquinone, 2, 3-dichloro-1, 4-naphthoquinone and 2-chloro-3-methoxy-1, 4-naphthoquinone. The limit of identification depends on the change in the structure of quinones, but microdetermination of hydrazides is possible in every case. Alphasubstituted hydrazides, on the other hand, react with naphtho-quinones to form only hypsochrome compounds.
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