HIGHEST CO(III)-CO(II) REDOX POTENTIAL IN CO(II)N6 (S=3/2) COMPLEXES OF TRIDENTATE LIGANDS - PREDOMINANCE OF STERIC OVER ELECTRONIC EFFECT

被引：26

作者：

MAHAPATRA, S ^{[1
]}

LAL, TK ^{[1
]}

MUKHERJEE, RN ^{[1
]}

机构：

[1] INDIAN INST TECHNOL,DEPT CHEM,KANPUR 208016,UTTAR PRADESH,INDIA

来源：

POLYHEDRON | 1993年 / 12卷 / 12期

关键词：

D O I：

10.1016/S0277-5387(00)84585-4

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Using the tridentate ligand 2,6-bis(pyrazol-1-ylmethyl)pyridine and its methyl-substituted derivatives a new group of high-spin grossly octahedral cobalt(II) complexes has been synthesized and characterized. The field strength of these ligands with high-spin cobalt(II) progressively decreases with an increase in the number of methyl substituents near the donor site, as revealed from their crystal-field spectral analysis. The trends in the anodic peak potentials (Co(III)-Co(II) couple with E1/2/E(pa) values of 0.78-1.06 V vs S.C.E.) are rationalized on the basis of predominance of the steric effect over the electronic effect of the methyl groups present near the donor site.

引用

页码：1477 / 1481

页数：5

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