STRUCTURAL STUDIES OF ORGANOMETALLIC COMPOUNDS IN SOLUTION .4. AN EXTENDED X-RAY ABSORPTION FINE-STRUCTURE (EXAFS) AND LARGE-ANGLE X-RAY-SCATTERING (LAXS) STUDY OF ORGANOMAGNESIUM BROMIDES IN DIETHYL-ETHER

被引：8

作者：

WELLMAR, A

HALLBERG, A

PERSSON, I

机构：

[1] SWEDISH UNIV AGR SCI, DEPT CHEM, POB 7015, S-75007 UPPSALA, SWEDEN

[2] LUND UNIV, CTR CHEM, S-22100 LUND, SWEDEN

[3] UNIV UPPSALA, DEPT ORGAN PHARMACEUT CHEM, S-75123 UPPSALA, SWEDEN

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 1991年 / 415卷 / 02期

基金：

美国国家卫生研究院;

关键词：

D O I：

10.1016/0022-328X(91)80117-3

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Phenylmagnesium bromide in diethyl ether solution has been studied by large angle X-ray scattering (LAXS) and extended X-ray absorption fine structures, EXAFS, techniques. The reagent is present as both dimeric and monomeric complexes in this solvent, with magnesium octahedrally coordinated in both cases. The Mg-Br bond distance is 2.56(2) angstrom and the Br-Br bond distance in the dimeric complex is 3.62(3) angstrom. The local structure around bromine in methyl- and ethyl-magnesium bromides has also been determined in diethyl ether solution by EXAFS. Data for the Br K edge were collected for solutions in the concentration range 0.1-1.0 M. For all the solutions the Mg-Br bond distance was found to be the same, 2.54 angstrom, within the limits of error. No other interaction was observed.

引用

页码：167 / 180

页数：14

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