Complexes of iron(III) salen and saloph Schiff bases with bridging dicarboxylic and tricarboxylic acids

被引：52

作者：

Kopel, P ^{[1
]}

Sindelar, Z ^{[1
]}

Klicka, R ^{[1
]}

机构：

[1] Palacky Univ, Dept Inorgan & Phys Chem, CR-77147 Olomouc, Czech Republic

来源：

TRANSITION METAL CHEMISTRY | 1998年 / 23卷 / 02期

关键词：

D O I：

10.1023/A:1006990925318

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Six new dinuclear or trinuclear Fe-III complexes involving tetradentate Schiff bases N,N'-bis(salicylidene)ethylenediamine (salenH(2)) or bis(salicylidene)-o-phenylene-diamine (salophH(2)) with 2,5-pyridinedicarboxylic acid, acetylenedicarboxylic acid or 1,3,5-benzenetricarboxylic acid have been synthesized and characterized by means of elemental analysis, i.r. spectroscopy, thermal analyses, conductivity measurements and variable-temperature magnetochemical measurements to the temperature of liquid nitrogen. The complexes can be characterized as high-spin distorted octahedral Fe-III bridged by carboxylic acids. The dicarboxylic or tricarboxylic acids play a role as bridges for weak antiferromagnetic intramolecular exchange. The antiferromagnetic coupling parameters J vary in the - 1.99 to 5.47 cm(-1) range for the dimers, whilst the values are -2.35 and 1.42 cm(-1) for the salen and saloph trimers, respectively. One complex, namely [{Fe(saloph)}(2)(2,5-dicarpy)] . H2O, obeys the Curie-Weiss law.

引用

页码：139 / 142

页数：4

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