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A formate bridged Ni(II) sheet and its 3D analogue in presence of a linear organic linker: Synthesis, crystal structure and magnetic properties

Authors
Journal
Polyhedron
0277-5387
Publisher
Elsevier
Publication Date
Volume
29
Issue
15
Identifiers
DOI: 10.1016/j.poly.2010.07.020
Keywords
  • Ni Complex
  • Formate
  • X-Ray
  • Dft Calculation
  • Coordination Polymer
Disciplines
  • Earth Science
  • Geography

Abstract

Abstract Reaction of formamide with Ni(NO 3) 2·6H 2O under hydrothermal condition in a mixture of MeOH/H 2O forms a two-dimensional formate bridged sheet Ni(HCOO) 2(MeOH) 2 ( 1). X-ray structure analysis reveals the conversion of formamide to formate which acts as a bridging ligand in complex 1 where the axial sites of Ni(II) are occupied by methanol used as a solvent. An analogous reaction in presence of 4,4′-bipyridyl (4,4′-bipy) yielded a three-dimensional structure Ni(HCOO) 2(4,4′-bpy) ( 2). DC magnetic measurements as a function of temperature and field established the presence of spontaneous magnetization with T c (Curie temperature) = 17 and 20.8 K in 1 and 2, respectively, which can be attributed due to spin-canting. DFT calculations were performed to corroborate the magnetic results of 1 and 2.

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