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The high-spin low-spin equilibrium of iron(II) in FeII(TRIM)2(PhCO2) (ClO4): Observation and interpretation of a gradual 5T2↔1A1 spin-state conversion

✍ Scribed by G. Lemercier; A. Bousseksou; S. Seigneuric; F. Varret; J.-P. Tuchagues

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
469 KB
Volume
226
Category
Article
ISSN
0009-2614

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✦ Synopsis

The Fe"(TRIM),(PhCO,) (ClO,) spin crossover complex (TRIM = 4'-(4-methylimidazole )-2'-(2"-methylimidazole) imidazole, PhCOr = C6H5C02) has been synthesized and investigated by Miissbauer spectroscopy and magnetic susceptibility measurements as a function of temperature. The spin conversion is gradual and exhibits a 5% LS fraction at 300 K and no residual HS fraction below 150 K. A theoretical approach based on the Ising-like model completed with additional degeneracies of vibrational origin successfully fits the data.

📜 SIMILAR VOLUMES

High spin (5T2)-low spin (1A1) equilibri
High spin (5T2)-low spin (1A1) equilibrium of iron (II) in M2FeSn3S8 thiospinels (M = Cu, Ag)
✍ M. Womes; J.-C. Jumas; J. Olivier-Fourcade; F. Aubertin; U. Gonser 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 324 KB

The compounds M2FeSn& (M=Cu, Ag) represent, to our knowledge, the first example ofan iron(I1) high spin ('T2) -low spin ('A, ) transition in the spine1 lattice. Additionally, these compounds are one of the rare caSes where such a spin transition is observed for bivalent iron in an octahedral sulfur