کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1307727 975152 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
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)
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
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)
چکیده انگلیسی

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.

The crystal and molecular structure of a new 4-methylpyridinium tetrachloroferrate(III) of molecular formula [4-Me(Py)H][FeCl4] was determined. 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.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Inorganica Chimica Acta - Volume 360, Issue 10, 2 July 2007, Pages 3354–3360
نویسندگان
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