Exchange interaction in a dinuclear iron(III) complex of a heptadentate Schiff base: Synthesis, crystal structure and magnetic properties

Zeyrek C., Elmali A., Elerman Y.

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, vol.60, no.7, pp.727-731, 2005 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 60 Issue: 7
  • Publication Date: 2005
  • Doi Number: 10.1515/znb-2005-0705
  • Journal Name: ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.727-731
  • Keywords: dinuclear iron(III) complex, super-exchange interactions, antiferromagnetic coupling, Schiff base, imidazolidine, MOLECULAR-STRUCTURE
  • Ankara University Affiliated: No

Abstract

Synthesis, crystallographic characterization and magnetic properties of the new dinuclear iron(III) complex Fe2L(OCH3)Cl-2 (L=1,3-bis[N-(3,5-dichloro-2-hydroxybenzylidene)-2-aminoethyl]-2-(3,5dichlo ro-2-hydroxyphenyl)imidazolidine) are reported. The structure consists of dinuclear units. The two iron(III) atoms are asymmetrically bridged by a phenoxo and a methoxo group. The iron(III) centers are separated by 3.133(2) angstrom. The Magnetic susceptibility of the complex was measured over the range 5 - 298 K and the observed data were successfully simulated by the equation based on the spin-Hamiltonian operator H = -J (S) over right arrow (1).(S) over right arrow (2). Magnetic susceptibility measurements indicate very weak antiferromagnetic coupling between the iron ions with J = -10.8 cm(-1) and g = 2.0.