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Correlation between the magnetic behaviors and dimensionality of intermolecular interactions in Fe(III) spin crossover compounds

Authors
Journal
Physica B Condensed Matter
0921-4526
Publisher
Elsevier
Publication Date
Volume
405
Issue
11
Identifiers
DOI: 10.1016/j.physb.2009.10.029
Keywords
  • Spin Crossover
  • Fe(Iii) Complex
  • Pressure Effect
  • Crystal Structure
  • Intermolecuar Interaction
  • Cooperativity

Abstract

Abstract A novel Fe(III) spin crossover (SCO) complex with a linear I 3 anion, [Fe(qsal) 2]I 3 1 [qsalH= N-(8-quinolyl)-salicylaldimine], was prepared and characterized by the magnetic susceptibilities and crystal structures. 1 exhibited a gradual SCO conversion ( T SCO=ca.240 K). The crystal structural analyses for 1 at 50 and 293 K revealed that the two-dimensional (2D) network was constructed by intermolecular π– π interactions between π-ligands of an Fe(III) cation. Since the related complex, [Fe(qsal) 2]NCS 2, was known to show a cooperative SCO transition, the crystal structure of 2 at 293 K was also determined. 2 possessed 2D SCO cation arrangement similar to 1, whereas potential π– π interactions between 2D networks in 2 existed. The dimensionality of intermolecular interactions was closely related to SCO behaviors and pressure effects on SCO compounds.

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