GAMMA-RESORCYCLIC ACID, ITS MONOHYDRATE AND ITS PYRIDINIUM COMPLEX

被引：30

作者：

GDANIEC, M ^{[1
]}

GILSKI, M ^{[1
]}

DENISOV, GS ^{[1
]}

机构：

[1] ST PETERSBURG STATE UNIV,INST PHYS,ST PETERSBURG 198904,RUSSIA

来源：

ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS | 1994年 / 50卷

关键词：

D O I：

10.1107/S0108270194000557

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The crystal structures of gamma-resorcyclic acid (2,6-dihydroxybenzoic acid), C7H6O4, (I), gamma-resorcylic acid monohydrate, C7H6O4.H2O, (II), and pyridinium gamma-resorcyulate, C5H6N+.C7H5O4-, (III), have been determined. In (I) and (II), the carboxyl group of the gamma-resorcylic acid molecule is in an anti conformation and the carboxylic OH group is involved as a donor in an O-H...O intramolecular hydrogen bond. This bond is part of an infinite hydrogen-bonded chain with mixed sigma- and pi-bond cooperativity. Structure (II) is disordered and may be considered to result from the superposition of two lower-symmetry structures related by a mirror plane. Structure (III) consists of discrete complex units formed from the anion and cation by means of an N-H...O hydrogen bond.

引用

页码：1622 / 1626

页数：5

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