|
Crystal Research and Technology |
Cryst. Res. Technol. 41, 510 (2006) - Abstract -
Synthesis, crystal structure, magnetic characterization and spectroscopic properties of a new dinuclear iron(III) complex asymmetrically bridged by a phenoxo and methoxo groups
C. T. Zeyrek, A. Elmali*, and Y. Elerman*
Turkish Atomic Energy Authority, 06690 Lodumlu-Ankara, Turkey
*Ankara University, Faculty of Engineering, Department of Engineering Physics, 06100 Beºevler-Ankara, Turkey
| Keywords | crystal structure, dinuclear iron(III), Schiff base, imidazolidine, super-exchange interactions, antiferromagnetic coupling, IR |
| PACS | 61.66.Fn |
| DOI | 10.1002/crat.200510614 |
Dinuclear iron(III) derivative of Fe2L1(OCH3)Cl2 (L1 = 1,3-bis[N-(5-bromo-2-hydroxybenzylidene)-2-aminoethyl]-2-(5-bromo-2-hydroxyphenyl)imidazolidine) has been synthesized, its crystal structure determined and magnetically characterized. The title compound crystallizes in orthorhombic space group Pbcn with cell parameters a = 12.9770(10), 18.7930(10), 25.2950(10) Å, V = 6168.9(6)Å3, Z = 8, Dcal = 1.951 Mg/m3. The two iron(III) ions are asymmetrically bridged by a phenoxo and methoxo groups in the compound. The iron(III) centers are separated by 3.166(3) Å. Magnetic susceptibilities of the complex were measured over the range 5 – 298 K and the observed data were successfully simulated by the equation based on the spin-Hamiltonian operator. Magnetic susceptibility measurements indicate very weak antiferromagnetic coupling between the iron(III) ions with J = – 11.5 cm-1. The comparison of the magnetic and structural parameters of the investigated compound is given and the nature of the magnetic super-exchange interaction of the title compound is compared with similar dinuclear iron(III) complexes.
The full text of this paper in pdf-Format: 
If you have come directly to this page, click this symbol 
to go to the CRT homepage.