کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1307727 | 975152 | 2007 | 7 صفحه PDF | دانلود رایگان |

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
Journal: Inorganica Chimica Acta - Volume 360, Issue 10, 2 July 2007, Pages 3354–3360