Synthesis, crystal structure, and spectroscopic and magnetic properties of a dinuclear iron(III) complex asymmetrically bridged by a phenoxo and a methoxo group

Zeyrek C., Elmali A., Elerman Y.

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, vol.60, no.9, pp.940-944, 2005 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 60 Issue: 9
  • Publication Date: 2005
  • Doi Number: 10.1515/znb-2005-0905
  • Journal Name: ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.940-944
  • Keywords: dinuclear iron(III) complex, super-exchange interactions, antiferromagnetic coupling, Schiff base, imidazolidine, TRANSITION-METAL-COMPLEXES, MAGNETOSTRUCTURAL CORRELATIONS, SALICYLALDIMINE COMPLEXES, EXCHANGE INTERACTION, LIGAND
  • Ankara University Affiliated: No

Abstract

A new dinuclear iron(III) derivative Fe2L(OCH3)Cl-2 (L = 1,3-bis[N-(5-chloro-2-hydroxybenzylidene)-2-aminoethyl]-2-(5-chloro-2-hydroxyphenyl)imidazolidine) has been synthesized, it crystal structure determined and magnetically characterized. The two iron(III) ions are asymmetrically bridged by a phenoxo and a methoxo group and separated by 3.150(2) angstrom. The magnetic susceptibility of the complex was measured over the range 5-349.3 K and the observed data were successfully simulated by the equation based on the spin-Hamiltonian operator H = -J (S) over right arrow (1) center dot (S) over right arrow (2), indicating very weak antiferromagnetic coupling between the iron ions with J = -11.3 cm(-1). The magnetic and structural parameters of the compound and the nature of the magnetic super-exchange interaction are discussed and compared with data of similar dinuclear iron(III) complexes.