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- Title
Spin-crossover in complexes of iron(II) carboranes with tris(pyrazol-1-yl)methane.
- Authors
Shakirova, O.; Daletskii, V.; Lavrenova, L.; Varnek, V.; Rudakov, D.; Potkin, V.
- Abstract
Synthesis procedures for coordination compounds of iron(II) 1,5,6,10-tetra(R)-7,8-dicarba- nido-undecaborates(-1) (carboranes) with tris(pyrazol-1-yl)methane (HC(pz)) of the composition [Fe{HC(pz)}]A· nHO (A = (7,8-CBH) ( I), (1,5,6,10-Br-7,8-CBH) ( II), (1,5,6,10-I-7,8-CBH) ( III), n = 0-2) are developed. The compounds are studied by static magnetic susceptibility in the temperature range of 160-500 K, electron (diffuse reflectance spectra), IR, and Mössbauer spectroscopy methods. It is shown that the complexes have high-temperature spin-crossover A ⇔ T. Transition temperatures ( T) for I-III are 370 K, 380 K, and 400 K respectively. Spin-crossover is accompanied by thermochromism (color change: pink ⇔ white).
- Subjects
IRON compounds; CARBORANES; METHANE; CHEMICAL synthesis; COORDINATION compounds; MAGNETOCHEMISTRY; TRANSITION temperature
- Publication
Journal of Structural Chemistry, 2014, Vol 55, Issue 1, p45
- ISSN
0022-4766
- Publication type
Article
- DOI
10.1134/S0022476614010077