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- Title
Temperature- and pressure-dependent structural study of {Fe(pmd)<sub>2</sub>[Ag(CN)<sub>2</sub>]<sub>2</sub>}<sub> n</sub> spin-crossover compound by neutron Laue diffraction.
- Authors
Rodríguez-Velamazán, José Alberto; Cañadillas-Delgado, Laura; Castro, Miguel; McIntyre, Garry J.; Real, José Antonio
- Abstract
The effect of pressure (up to 0.17 GPa) on the spin-crossover compound {Fe(pmd)2[Ag(CN)2]2} n [orthorhombic isomer (II), pmd = pyrimidine] has been investigated by temperature- and pressure-dependent neutron Laue diffraction and magnetometry. The cooperative high-spin ↔ low-spin transition, centred at ca 180 K at ambient pressure, is shifted to higher temperatures as pressure is applied, showing a moderate sensitivity of the compound to pressure, since the spin transition is displaced by ca 140 K GPa−1. The space-group symmetry (orthorhombic Pccn) remains unchanged over the pressure-temperature (P-T) range studied. The main structural consequence of the high-spin to low-spin transition is the contraction of the distorted octahedral [FeN6] chromophores, being more marked in the axial positions (occupied by the pmd units), than in the equatorial positions (occupied by four [Ag(CN)2]− bridging ligands).
- Subjects
TEMPERATURE; PYRIMIDINES; PRESSURE; HIGH temperatures; CHEMICALS; SPACE groups; CHROMOPHORES
- Publication
Acta Crystallographica Section B: Structural Science, Crystal Engineering & Materials, 2014, Vol 70, Issue 3, p436
- ISSN
2052-5192
- Publication type
Article
- DOI
10.1107/S2052520614003023