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Synthesis, Crystal Structure, Magnetic Properties and 57Fe Mössbauer Spectroscopy of the New Trinuclear [Fe3(4-(2′-hydroxyethyl)-1,2,4-triazole)6(H2O)6](CF3SO3)6 Spin Crossover Compound

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Garcia, Yann [UCL] Guionneau, Philippe [] Bravic, Georges [] Chasseau, Daniel [] Howard, Judith A. K. [] Gütlich, Philipp []

Hyetrz = 4-(2prime-hydroxyethyl)-1,2,4-triazole represents the first structurally characterized iron(II) spin crossover compound for which the structure has been solved above and below room temperature in both spin states. The compound crystallizes in the trigonal system, space group R3, a = 12.763(1) &bgr;= 67.144(1), V = 1684.3(1) 3, Z = 6 at 120K. At 330K the space group is retained and a = 13.0183(3) &bgr;=67.376(3), V = 1805.8(1) 3. The molecular structure consists of trinuclear FeII entities linked together by an unprecedented three-dimensional network of hydrogen bonds. This compound shows a gradual spin crossover behavior centered around room temperature, which has been followed by temperature-dependent magnetic susceptibility measurements as well as by 57Fe M ssbauer spectroscopy. The nature of the spin crossover behavior is discussed on the basis of the structural features.

Document type Article de périodique (Journal article)
Publication date 2000
Language Anglais
Journal information "European Journal of Inorganic Chemistry" - Vol. 2000, no. 7, p. 1531-1538 (2000)
Peer reviewed yes
Publisher Wiley - V C H Verlag GmbH & Co. KGaA ((Germany) Weinheim)
issn 1434-1948
e-issn 1099-0682
Publication status Publié
Affiliations University of Mainz (Germany) - Inorganic and Analytical Chemistry
UCL - Autre
Links
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Bibliographic reference Garcia, Yann ; Guionneau, Philippe ; Bravic, Georges ; Chasseau, Daniel ; Howard, Judith A. K. ; et. al. Synthesis, Crystal Structure, Magnetic Properties and 57Fe Mössbauer Spectroscopy of the New Trinuclear [Fe3(4-(2′-hydroxyethyl)-1,2,4-triazole)6(H2O)6](CF3SO3)6 Spin Crossover Compound. In: European Journal of Inorganic Chemistry, Vol. 2000, no. 7, p. 1531-1538 (2000)
Permanent URL http://hdl.handle.net/2078/92643