MIXED-LIGAND LANTHANIDE COMPLEXES .7. COMPLEXES OF 1,10-PHENANTHROLINE AND THIOCYANATE

被引：29

作者：

KHAN, AA ^{[1
]}

IFTIKHAR, K ^{[1
]}

机构：

[1] JAMIA MILLIA ISLAMIA,DEPT CHEM,NEW DELHI 110025,INDIA

来源：

POLYHEDRON | 1994年 / 13卷 / 23期

关键词：

D O I：

10.1016/S0277-5387(00)83382-3

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The thiocyanatoaqua-tris(1,10-phenanthroline) lanthanide(III)thiocyanates, [Ln(phen)(3)(H2O)(SCN)](SCN)(2) (where Ln = La-III and all trivalent lanthanides, except Pm and Lu) have been synthesized and characterized. The molar conductances, IR spectra and thermograms show the presence of both coordinated and non-coordinated thiocyanate. The complexes are eight-coordinate. Very large chemical shifts are observed in the NMR spectra of paramagnetic complexes. The interelectronic and covalency parameters calculated for the complexes show the covalent nature of bonding between the metal and the ligand. The oscillator strengths of the f-f transitions are calculated and discussed. The complexes appear to accept one solvent molecule (DMSO) and become nine-coordinate in solution.

引用

页码：3199 / 3208

页数：10

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