Issue 24, 2014

Synthesis, crystal structure, magnetic study and magneto-structural correlation of three Cu(ii) complexes formed via pyridine bis(hydrazone) based ligand

Abstract

This report describes the synthesis and characterization of three different complexes of molecular formulae {[Cu6L2(ClO4)4(μ-ClO4)2(H2O)9](ClO4)2·8H2O}n(1), [Cu6L2Cl62-Cl)2(H2O)2]·3H2O (2) and [Cu9L6](ClO4)6·6H2O·2CH3CN·CH3OH (3), where, H2L = bis[(2-pyridyl)methylene] pyridine 2,6 dicarbohydrazone. X-ray crystallography reveals that complex 1 exhibits 1D chain, complex 2 is a hexanuclear entity and an unsymmetrical [3 × 3] grid formation in complex 3. Variable temperature magnetic measurements were performed, they show that weak antiferromagnetic interactions exist among the metal centers in complex 1 and both ferro- and antiferromagnetic interactions coexist for complexes 2 and 3. Below 20 K antiferromagnetic interactions dominate for complex 2 whereas it is ferromagnetic for complex 3. Transformation from one cage to another is possible at mild reaction conditions, which results in a dramatic change in the magnetic properties.

Graphical abstract: Synthesis, crystal structure, magnetic study and magneto-structural correlation of three Cu(ii) complexes formed via pyridine bis(hydrazone) based ligand

Supplementary files

Article information

Article type
Paper
Submitted
18 Oct 2013
Accepted
07 Jan 2014
First published
20 Jan 2014

RSC Adv., 2014,4, 12408-12414

Synthesis, crystal structure, magnetic study and magneto-structural correlation of three Cu(II) complexes formed via pyridine bis(hydrazone) based ligand

A. Adhikary, J. A. Sheikh, A. D. Konar and S. Konar, RSC Adv., 2014, 4, 12408 DOI: 10.1039/C3RA45928D

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