ANOMALOUS SOLUTION BEHAVIOR OF ISOMORPHOUS COMPLEXES OF ZIRCONIUM-(IV) AND HAFNIUM-(IV)

被引：12

作者：

EVANS, DF ^{[1
]}

GRIFFITHS, GW ^{[1
]}

OMAHONEY, C ^{[1
]}

WILLIAMS, DJ ^{[1
]}

WONG, CY ^{[1
]}

WOOLLINS, JD ^{[1
]}

机构：

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

来源：

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1992年 / 16期

关键词：

D O I：

10.1039/dt9920002475

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The synthesis of [Zr(IV)(egta)] and [Hf(IV)(egta)] in aqueous solution, where H-4egta = ethylenedioxydiethyl-enedinitrilotetraacetic acid, is reported. The eight-co-ordinate complexes have been characterised by X-ray crystallography, H-1 NMR spectroscopy, mass spectrometry and elemental analysis. The two compounds are isostructural in the solid state. Solution studies by H-1 NMR spectroscopy show that the hafnium analogue has a higher degree of symmetry. In particular, the spectrum of the zirconium complex reveals all of the methylene groups to be inequivalent whereas in the hafnium complex the -N (CH2CO2)2- and the -NCH2CH2O- methylene groups show increased magnetic equivalence.

引用

页码：2475 / 2479

页数：5

共 5 条

[1] ZIRCONIUM COMPLEXES IN AQUEOUS SOLUTION .1. REACTION WITH MULTIDENTATE LIGANDS [J].