Synthesis, crystal structures and magnetic properties of five new metal(II) compounds constructed with isomers of aminobenzonitrile and dicyanamide ligands

Moumita Biswas, Georgina M. Rosair, Guillaume Pilet, M. Salah El Fallah, Joan Ribas, Samiran Mitra

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Five new compounds formulated as [NiII(dca)2(para-ABN)2(H2O)2] (1), [CuII(dca)2(para-ABN)2(H2O) 2] (2), [CuII(dca)2(para-ABN)2]n, (3), [CuII(dca)2(ortho-ABN)2]n, (4) and [CdII(dca)2(meta-ABN)2]n (5), where dca = dicyanamide and ABN = aminobenzonitrile, have been synthesized and characterized by single crystal X-ray diffraction studies and low temperature (300-2 K) magnetic measurements. The structural analyses revealed that 1 and 2 are isomorphous where dca and para-ABN both act as monodentate ligands. 3 consists of infinite double stranded chains of Cu(II) ions connected through the para-ABN bridges whereas 4 and 5 consist of infinite double stranded chains of Cu(II) and Cd(II) respectively, connected through µ1,5-dca bridges. The compounds extend their geometries to three-dimensional for 1-3 and 5 and two-dimensional for 4 through hydrogen bonding interactions. All the metal ions Ni2+, Cu2+ and Cd2+ are located on inversion centres and have distorted octahedral coordination geometries. The variable temperature magnetic susceptibility measurements show that the global feature of the ?MT versus T curves for 3 and 4 is characteristic of very weak antiferromagnetic interactions and between 300 and 2 K the best fit parameters were determined as J = -2.35 and -5.1 cm-1, respectively. © 2006 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)123-132
Number of pages10
JournalPolyhedron
Volume26
Issue number1
DOIs
Publication statusPublished - 2 Jan 2007

Keywords

  • Bridging ligands (dca, ABN)
  • First Cu-ABN compounds
  • Magnetic properties
  • Metal (nickel, copper, cadmium)
  • Supramolecular structures

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