"Normal" and "reverse" spin crossover induced by two different structural events in iron() coordination polymer

In [Fe(ebbtr) 2 (CH 3 CN) 2 ](CF 3 SO 3 ) 2 ·4CH 3 CN spin crossover is associated with the occurrence of "normal" and "reverse" hysteresis loops separated by a region of stable HS form. This results from trans - trans → gauche - trans conformational changes of ebbtr molecules an...

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Bibliographic Details
Published inChemical communications (Cambridge, England) Vol. 55; no. 49; pp. 733 - 736
Main Authors Weselski, Marek, Ksi ek, Maria, Mess, Pamela, Kusz, Joachim, Bronisz, Robert
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 2019
Subjects
Coordination polymers
Crossovers
Crystallography
Hysteresis loops
Iron
Magnetic permeability
X-ray diffraction
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Summary:In [Fe(ebbtr) 2 (CH 3 CN) 2 ](CF 3 SO 3 ) 2 ·4CH 3 CN spin crossover is associated with the occurrence of "normal" and "reverse" hysteresis loops separated by a region of stable HS form. This results from trans - trans → gauche - trans conformational changes of ebbtr molecules and anion reorientation, which occur in different ways during cooling and during heating. Conformational changes of the bridging ligand and reorientation of the anions are associated with a sequence of HT(HS) HT(HS/LS) IP(HS) LT(LS) transitions accompanied by existence of two hysteresis loops, "normal" and "reverse", separated by a region of the stability of the HS form.
Bibliography:For ESI and crystallographic data in CIF or other electronic format see DOI
10.1039/c9cc02755f
Electronic supplementary information (ESI) available: Tables S1-S4 and Fig. S1-S13, experimental details, magnetic susceptibility, Mössbauer, X-ray diffraction and IR data. CCDC
1905014-1905023
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1359-7345
1364-548X
DOI:10.1039/c9cc02755f