Structural and magnetic characteristics of tetramethylammonium tetrahalogenoferrates(III)
作者:Dariusz Wyrzykowski、Rafał Kruszyn´ski、Julia Kłak、Jerzy Mrozin´ski、Zygmunt Warnke
DOI:10.1016/j.ica.2007.07.022
日期:2008.1
A series of tetramethylammonium tetrahalogenoferrates(III), [FeBr4-nCln](-) (n = 0, 1, 3,4), of general formula [(CH3)(4)N][FeBr4-nCln], have been synthesized. The crystal and molecular structure of [(CH3)(4)N][FeCl4] was determined. The compound is isostructural with its [FeBr4-nCln](-) (n = 0, 1, 3,4) analogues. Magnetic measurements of the powdered samples of [(CH3)(4)N][FeBr4-nCln] gave negative values of the Weiss constant, which suggest antiferromagnetic coupling. The strength of the antiferromagnetic interactions strongly depends on the kind of halide ligands in the coordination sphere of iron(III) and increases with an increasing number of the bromide anions. (c) 2007 Published by Elsevier B.V.