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[腙衍生物4-R-3R1-噻唑-2-酮的酸碱平衡。I. 苯甲酸的α-甲基-β-(4-R-噻唑-2-基)-和α-甲基-β-(4-R-3-R1-噻唑-2-亚基)-酰肼的电离常数]

[Acid-base equilibrium of hydrazone derivatives 4-R-3R1-thazol-2-one. I. Ionization constants of alpha-methyl-beta-(4-R-thiazol-2-yl)- and alpha-methyl-beta-(4-R-3-R1-thiazol-2-ylidene)-hydrazides of benzoic acid].

作者信息

Bielak L, Kiełczykowska M, Biliński S

机构信息

Katedra i Zakład Chemii Ogólnej, Akademia Medyczna w Lublinie.

出版信息

Ann Univ Mariae Curie Sklodowska Med. 1992;47:5-14.

PMID:1365802
Abstract

The ionization constants of the following compounds have been determined spectrophotometrically in aqueous solution: [table: see text] The comparison of absorption spectra in UV and pK values of the compounds being described in this work and of the derivatives having a thiazole or thiazoline structure which were studied previously let us suggest that in the II-H neutral molecule and the I-H and II-H mono-anion the thiazole form prevails while in the case of the I-H neutral molecule the thiazoline form is more probable.

摘要

已通过分光光度法在水溶液中测定了以下化合物的电离常数

[表格：见原文] 对本工作中所描述的化合物以及先前研究的具有噻唑或噻唑啉结构的衍生物的紫外吸收光谱和pK值进行比较后，我们认为在II-H中性分子以及I-H和II-H单阴离子中，噻唑形式占主导，而在I-H中性分子的情况下，噻唑啉形式更有可能。

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