SUBSTITUENT EFFECT ON SPECTROCHEMICAL PROPERTIES OF COBALT(II) HALIDE COMPLEXES WITH N-MONOSUBSTITUTED 1,3-IMIDAZOLIDINES-2-THIONE

被引:24
作者
DEVILLANOVA, FA
VERANI, G
机构
[1] Istituto Chimico Policattedra, 09100 Cagliari
关键词
D O I
10.1016/S0020-1693(00)89038-6
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
By reacting cobalt(III) halides with N-methyl and N-ethyl,1,3-eimidazolidine-2-thione, CoL2X2 complexes (X = Cl, Br, I) are obtained. The infrared spectra show them to be S-bonded to the metal; the νCoS vibrations are located within 340-320 cm-1. Colours, magnetism and electronic spectra support a tetrahedral stereochemistry. Using the average ligand field approximation, Dq and B′ values for [COL4]2+ are evaluated and the ligands are inserted in the spectrochemical and nephelauxetic series. The Dq values seem to depend on the electron releasing effect of the alkyl groups. © 1978.
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页码:209 / 213
页数:5
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