A Pyrazole-Expanded EDTA Ligand and its Pentanuclear Iron(III) Complex

被引：3

作者：

Fischer, Stefan ^{[1
]}

Demeshko, Serhiy ^{[1
]}

Dechert, Sebastian ^{[1
]}

Meyer, Franc ^{[1
]}

机构：

[1] Univ Gottingen, Inst Anorgan Chem, D-37077 Gottingen, Germany

来源：

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 2012年 / 638卷 / 3-4期

关键词：

Pyrazole ligand; Bridging ligands; Iron; Magnetic properties; Mo ss bauer spectroscopy; X-ray diffraction; MAGNETOSTRUCTURAL CORRELATIONS; MAGNETIC-PROPERTIES; CRYSTAL-STRUCTURES; BINUCLEAR; TETRANUCLEAR; REACTIVITY; DEPENDENCE; CLUSTERS;

D O I：

10.1002/zaac.201100534

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A new ligand H5L has been synthesized that is composed of a central pyrazole bridging unit with two iminodiacetate chelate arms, thus providing two potentially tetradentate {N2O2} binding pockets. Its pentanuclear ferric complex [L2Fe5(mu 3-O)2(mu-OH)2(py)2(H2O)2] (1) was obtained under aerobic conditions and characterized by X-ray crystallography as well as Mossbauer spectroscopy. SQUID data suggest the presence of competing spin interactions and an S = 5/2ground state, which is discussed in the light of the structural features. The new ligand H5L appears to be suitable for producing a variety of new multinuclear oxo- and hydroxo-bridged iron(III) aggregates and for stabilizing high-valent diiron cores.

引用

页码：621 / 627

页数：7

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