CRYSTAL-STRUCTURE AND EPR-SPECTRUM OF BISPYRIDINIUM BIS(CITRATO)CHROMIUM(III) TETRAHYDRATE

被引：34

作者：

QUIROS, M ^{[1
]}

GOODGAME, DML ^{[1
]}

WILLIAMS, DJ ^{[1
]}

机构：

[1] IMPERIAL COLL SCI TECHNOL & MED,DEPT CHEM,LONDON SW7 2AY,ENGLAND

来源：

POLYHEDRON | 1992年 / 11卷 / 11期

关键词：

D O I：

10.1016/S0277-5387(00)83364-1

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Citric acid reacts with chromium(VI) in aqueous solution leading to the formation of chromium(V), easily detectable by EPR. However, the redox reaction goes further with the formation of a chromium(III) citrate complex. This has been crystallized as the pyridinium salt and analysed by EPR and X-ray diffraction. The structure contains discrete Cr(Cit)2(2-) units, in which the chromium atom is octahedrally coordinated by two tridentate citrate anions. The anions and the solvate water molecules are linked by an extensive set of hydrogen bonds. The X-band and Q-band EPR spectra are well resolved, showing a large and highly anisotropic zero-field splitting.

引用

页码：1343 / 1348

页数：6

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