Gradual Thermal Spin-Crossover Mediated by a Reentrant Z' = 1 â Z' = 6 â Z' = 1 Phase Transition.
Inorg Chem
; 56(6): 3144-3148, 2017 Mar 20.
Article
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| MEDLINE
| ID: mdl-28244751
ABSTRACT
The Fe[BF4]2 complex of the Schiff base podand tris[4-(thiazol-4-yl)-3-aza-3-butenyl]amine exhibits gradual thermal spin-crossover with T1/2 ≈ 208 K in the solid state. A weak discontinuity in the magnetic susceptibility curve at 190 K is associated with a reentrant symmetry-breaking transition involving a trebling of the unit cell volume (from P21/c, Z = 4, to P21, Z = 12). The intermediate phase contains six independent cations in puckered layers of low-spin, and high-spin or mixed-spin, molecules with an overall 30% high-spin population at 175 K.
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