Magnetic properties and crystal structure of a dinuclear iron(III) complex

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Elmali A., Elerman Y., Svoboda I.

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, vol.56, no.9, pp.897-900, 2001 (SCI-Expanded)

• Publication Type: Article / Article
• Volume: 56 Issue: 9
• Publication Date: 2001
• Doi Number: 10.1515/znb-2001-0906
• Journal Name: ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
• Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
• Page Numbers: pp.897-900
• Keywords: binuclear iron(III) complex, super-exchange interactions, antiferromagnetic coupling
• Ankara University Affiliated: No

Abstract

[FeL(MeOH)Cl](2) (L = N-(5-methylphenyl)-3-methoxysalicylaldimine) was synthesized and its crystal structure determined, [C30H26Cl2Fe2N2O6], triclinic, space group P (1) over bar a = 7.481(2), b = 9.436(2), c = 10.961(2) Angstrom, alpha = 69.790(10), beta = 82.440(10), gamma = 83.690(10)degrees, V= 718.1(3) Angstrom (3), Z = 1. Two identical [FeLCl] fragments, related by an inversion centre, are connected by two bridging O atoms to form a binuclear unit. The iron(III) centers are separated by 3.196(2) Angstrom and weakly antiferromagnetically coupled (J = -10.4(1) cm(-1)), which follows from temperature-dependent magnetic susceptibility measurements in the range 5.1 to 275.6 K. The magnetic moment at 275.6 K is ca. 7.02 B. M., but 0.99 B. M. at 5.1 K. The magnetic susceptibility is at a maximum near 80 K and decreases rapidly as the temperature is lowered to liquid helium temperature.