Title of article :
Spin-crossover in the complex of iron(II) nitrate with tris(3,5-dimethylpyrazol-1-yl)methane
Author/Authors :
Lavrenova، نويسنده , , Ludmila G. and Virovets، نويسنده , , Alexander V. and Peresypkina، نويسنده , , Eugenia V. and Strekalova، نويسنده , , Anna D. and Piryazev، نويسنده , , Dmitry A. and Daletsky، نويسنده , , Vasiliy A. and Sheludyakova، نويسنده , , Liliya A. and Vasilevsky، نويسنده , , Sergey F.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Abstract :
Novel coordination compound [Fe(HC(3,5-Mepz)3)2](NO3)2 is obtained by a reaction of Fe(NO3)2 with tris(3,5-dimethylpyrazol-1-yl)methane. The compound is characterized with magnetic susceptibility method, electronic (diffuse reflection) and IR spectroscopy and powder diffraction. According to temperature dependence μeff(T) the compound possesses spin-crossover 1A1 ⇔ 5T2 with hysteresis (Tc↑ = 231, Tc↓ = 227 K) accompanied by thermochromism (pink ⇔ colorless). A crystal structure of the compound was determined just before (T = 240 K, FeHS–N 2.14–2.18 Å) and after (T = 123 K, FeLS–N 1.97–1.99 Å) spin phase transition.
Keywords :
spin-crossover , Iron(II) , Magnetic properties , Thermochromism , Tris(3)5-dimethylpyrazol-1-yl)methane , crystal structure
Journal title :
INORGANICA CHIMICA ACTA
Journal title :
INORGANICA CHIMICA ACTA
