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1 A 1 ⇄ 5 T 2 Spin Transition in New Thermochromic Iron(II) Complexes with 1,2,4-Triazole and 4-Amino-1,2,4-Triazole

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Abstract

New complexes of iron(II) chloride and bromide with 1,2,4-triazole (Htrz) and 4-amino-1,2,4-tri-azole (NH2trz) of composition Fe(Htrz)3Cl2 · 1.5H2O, Fe(NH2trz)3Cl2 · 2H2O, Fe(Htrz)3Br2 · 2H2O, and the Fe(NH2trz)3SO4 · H2O complex were synthesized and studied by magnetochemical, electronic, IR and Mössbauer spectroscopy methods. Magnetochemical studies showed that these complexes exhibit 1 A 1 ⇄ 5 T 2 spin transition accompanied by thermochromism (a reversible pink ⇄ white change of color).

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Authors and Affiliations

  1. Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent'eva 3, Novosibirsk, 630090, Russia

    L. G. Lavrenova, O. G. Shakirova, V. N. Ikorskii, V. A. Varnek, L. A. Sheludyakova & S. V. Larionov

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  1. L. G. Lavrenova
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  2. O. G. Shakirova
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  3. V. N. Ikorskii
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  4. V. A. Varnek
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  5. L. A. Sheludyakova
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  6. S. V. Larionov
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Lavrenova, L.G., Shakirova, O.G., Ikorskii, V.N. et al. 1 A 1 ⇄ 5 T 2 Spin Transition in New Thermochromic Iron(II) Complexes with 1,2,4-Triazole and 4-Amino-1,2,4-Triazole. Russian Journal of Coordination Chemistry 29, 22–27 (2003). https://doi.org/10.1023/A:1021834715674

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