Synthesis, characterization, electrochemical and magnetic studies on manganese(III) complexes involving bridging carboxylates

被引：8
作者：
Biswas, Subhendu [2 ]
Dutta, Amit Kumar [3 ]
Mitra, Kamala [3 ]
Dul, Marie-Claire [4 ]
Dutta, Supriya [1 ]
Lucas, C. Robert [4 ]
Adhikary, Bibhutosh [3 ]
机构：
[1] Indian Assoc Cultivat Sci, Dept Inorgan Chem, Kolkata 700032, India
[2] Murshidabad Coll Engn & Technol, Cossimbazar 742102, Murshidabad, India
[3] Bengal Engn & Sci Univ, Dept Chem, Sibpur 711103, Howrah, India
[4] Mem Univ Newfoundland, Dept Chem, St John, NF A1B 3X7, Canada
来源：
INORGANICA CHIMICA ACTA | 2011年 / 377卷 / 01期
关键词：
Manganese(III) complexes; Phenolate Schiff bases; Carboxylate bridge; Crystal structure; Electrochemistry; Magnetochemistry; SCHIFF-BASE COMPLEXES; STRUCTURAL-CHARACTERIZATION; CHEMISTRY; LIGANDS; SALEN; MONONUCLEAR; DIMER; BOND;
D O I：
10.1016/j.ica.2011.07.041
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A series of carboxylate-bridged manganese(III) complexes derived from Schiff bases obtained by the condensation of salicylaldehyde or 5-bromo-salicylaldehyde and different types of diamine have been synthesized and characterized and, in the case of [Mn-2(L1)(2)(mu-ClCH2COO)](ClO4)(1), the structure has been obtained by X-ray crystallography. The structure of 1 consists of two manganese atoms separated by 5.487(3) angstrom and bridged by a carboxylate anion. This dinuclear structural unit is linked by bridging phenoxy oxygens to adjacent dinuclear units to produce a one-dimensional chain. Cyclic voltammograms of all the compounds exhibit grossly similar features consisting of a reversible or quasi-reversible Mn-III/Mn-II reduction and a Mn-III/Mn-IV oxidation. It has been observed that bromo-substitution stabilizes the lower oxidation state in the Mn-III/Mn-II couple and destabilizes the higher oxidation state in the Mn-III/Mn-IV couple. Variable temperature magnetic susceptibility measurements of 1 show a weak antiferromagnetic interaction. The magnetic behavior is satisfactorily modeled by inclusion of zero-field splitting and an intermolecular interaction component. (C) 2011 Elsevier B. V. All rights reserved.
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页码：56 / 61
页数：6
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