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Indexed by:期刊论文

Date of Publication:2003-09-08

Journal:INORGANICA CHIMICA ACTA

Included Journals:Scopus、SCIE

Volume:353

Page Number:284-291

ISSN No.:0020-1693

Key Words:manganese complexes; crystal structures; 2-pyrazinecarboxylate

Abstract:Two pyz complexes [Mn(pyz)(2)(H2O)(4)] (1) and [MnCl(pyz)(H2O)] (2) have been synthesized and structurally characterized. Complex 1 contains an eight-coordinate Mn(II) ion with square anti-prismatic geometry. The extensive intermolecular hydrogen-bonding interactions of O-carboxyl...H-O-aqua correlate the complex molecules, forming 2D polymeric layer structure. The structure of complex 2 contains 1D Mn/pyz chains, which link to each other by double mu(2)-Cl bridges to form 2D layer with Mn...Mn distance of 3.664 Angstrom. Hydrogen-bonding interactions of O-carboxyl...H-O-aqua are found between the layers to correlate the 2D layers to form a 3D framework. In addition, the variable temperature magnetic susceptibilities of complex 2 were measured and weak ferromagnetic exchange interactions between the neighboring magnetic species were found with J = 0.42 cm(-1). (C) 2003 Elsevier B.V. All rights reserved.