Synthesis and magnetic characteristics of new tetrachloroferrates(III) with 2-methylpyridinium, 3-methylpyridinium and 4-methylpyridinium cations: X-ray crystal structure of 4-methylpyridinium tetrachloroferrate(III)

被引:11
|
作者
Wyrzykowski, Dariusz
Kruszynski, Rafal
Klak, Julia
Mrozinski, Jerzy
Warnke, Zygmunt
机构
[1] Univ Gdansk, Fac Chem, PL-80952 Gdansk, Poland
[2] Tech Univ Lodz, Inst Gen & Ecol Chem, PL-90924 Lodz, Poland
[3] Univ Wroclaw, Fac Chem, PL-50383 Wroclaw, Poland
关键词
crystal structure; magnetic measurements; tetrachloroferrate(III); 2-methylpyridinium; 3-methylpyridinium; 4-methylpyridinium;
D O I
10.1016/j.ica.2007.04.001
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The crystal and molecular structure of a new 4-methylpyridinium tetrachloroferrate(III) of molecular formula [4-Me(Py)H][FeCl4] was determined. The iron cation is four coordinated by chlorine anions, and it adopts a slightly distorted tetrahedral coordination. with two angles smaller, three equal and one larger than tetrahedral one. The compound is isostructural with its 2- and 3-methylpyridinium analogues. Magnetic measurements of the powdered samples gave negative values of the Weiss constants equal -7.3 K, -6.6 K and -6.2 K for [2-Me(Py)H][FeCl4], [3-Me(Py)H][FeCl4] and [4-Me(Py)H][FeCl4], respectively, which suggest antiferromagnetic coupling. The susceptibility curves of all complexes exhibit maxima indicating the presence of antiferromagnetic ordering with a Neel temperature of approximately 7 K. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:3354 / 3360
页数:7
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