A NUCLEAR MAGNETIC RESONANCE STUDY OF EFFECT OF CHARGE ON SOLVENT ORIENTATION OF A SERIES OF CHROMIUM(3) COMPLEXES

被引：21

作者：

FRANKEL, LS

机构：

[1] Department of Chemistry, University of Massachusetts, Amherst

[2] Rohm and Haas Company, Research Laboratory 13, Philadelphia, PA 19137

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1969年 / 73卷 / 11期

关键词：

D O I：

10.1021/j100845a055

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Relative proton spin-spin relaxation times of N,N-dimethylformamide, N,N-dimethylacetamide and methanol in the solvation shell (second coordination sphere) of a variety of paramagnetic Cr(III) compounds have been obtained. The orientation of the ligands in the second coordination sphere may be flipped end to end depending on the charge of the solute. An ion dipole model is examined to explain the results. For ±3 charged solutes the ligands in the second coordination sphere are essentially completely oriented along the ligand dipole-moment vector. For solutes of lower charge the orientation is not complete. The effect of temperature is reported.

引用

页码：3897 / &

共 28 条

[1] PREFERENTIAL SOLVATION AND MECHANISMS OF THERMAL AND PHOTOCHEMICAL SOLVOLYSIS OF HEXATHIOCYANATOCHROMATE(3) ION IN ACETONITRILE-WATER MIXTURES [J].