Twelve-, fourteen- and sixteen-membered macrocyclic ligands and a study of the effect of ring size on ligand field strength

被引：75

作者：

Chandra, S ^{[1
]}

Gupta, K ^{[1
]}

机构：

[1] Univ Delhi, Zakir Husain Coll, Dept Chem, New Delhi 110002, India

来源：

TRANSITION METAL CHEMISTRY | 2002年 / 27卷 / 03期

关键词：

D O I：

10.1023/A:1014898706298

中图分类号：

O61 [无机化学];

学科分类号：

070301 [无机化学]; 081704 [应用化学];

摘要：

Complexes of Cr-III and N-II with a macrocyclic tetradendate 12-, 14- and 16-membered nitrogen donor ligand were prepared and characterized on the basis of elemental analysis, molar conductance, magnetic susceptibility measurements, i.r., electronic and e.p.r. spectra. The complexes are of the high-spin type. The effect of ring size on the Dq((xy)) value is also discussed and the field strength was found to have a maximum value for the 14-membered ring, when metal ion fits best into the cavity rather than when the metal ion is compressed by the macrocycle.

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页码：329 / 332

页数：4

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