Synthesis, structural characterization and magnetic properties of 2-pyrazinecarboxylate manganese compounds Mn(pyz)(2)(H2O)(4) and MnCl(pyz)(H2O) (n) (pyz=2-pyrazinecarboxylate)
2003 (English)In: Inorganica Chimica Acta, ISSN 0020-1693, E-ISSN 1873-3255, Vol. 353, 284-291 p.Article in journal (Refereed) Published
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).
Place, publisher, year, edition, pages
2003. Vol. 353, 284-291 p.
manganese complexes, crystal structures, 2-pyrazinecarboxylate, sodium-centered polyhedra, ray crystal-structure, polymeric structure, transition-metal, chain complex, ligands, acid, copper(ii), cobalt(ii), chloride
IdentifiersURN: urn:nbn:se:kth:diva-22836ISI: 000185519900037OAI: oai:DiVA.org:kth-22836DiVA: diva2:341534
QC 201005252010-08-102010-08-10Bibliographically approved