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Isostructural phase transition in the spin crossover compound [Fe(dpp)2(NCS)2] · py

  • Joachim Kusz , Maciej Zubko , Andy Fitch and Philipp Gütlich
Published/Copyright: April 8, 2011
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Zeitschrift für Kristallographie - Crystalline Materials
From the journal Volume 226 Issue 7

Abstract

The spin crossover complex [Fe(dpp)2(NCS)2] · py crystallises in the monoclinic P2/n space group with one guest pyridine molecule per iron complex and undergoes an isostructural phase transition near 100 K on cooling and around 155 K on heating. The space group does not change upon spin transition despite the occurrence of hysteresis with ca. 55 K width, which is clearly seen in the temperature dependence of the lattice parameters. These are highly anisotropic upon spin transition, and surprisingly the unit cell volume reduces only little (0.1%) upon spin transition from high spin to low spin phase. The differences between the high- and low-spin structures are discussed.


* Correspondence address: University of Silesia, Institute of Physics, ul. Bankowa 12, 40-007 Katowice, Polen,

Published Online: 2011-04-08
Published in Print: 2011-07

© by Oldenbourg Wissenschaftsverlag, Katowice, Germany

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