2d layer arrangement of solely [hs-hs] or [ls-ls] molecules in the [hs-ls] state of a dinuclear fe(Ii) spin crossover complex

Fuermeyer F, Carrella LM, Rentschler E (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Crystals MDPI

Book Volume: 10

Article Number: 448

Journal Issue: 6

DOI: 10.3390/cryst10060448

Abstract

Herein we report the synthesis and characterization of three new dinuclear iron(II) complexes [Fe^II 2(I⁴MTD)2](F3CSO3)4 (C1), [Fe^II 2(I⁴MTD)2](ClO4)4 (C2) and [Fe^II 2(I⁴MTD)2](BF4)4 (C3) based on the novel ligand (I⁴MTD = 2,5-bis{[(1H-imidazol-4-ylmethyl)amino]methyl}-1,3,4-thiadiazole). Magnetic susceptibility measurements and single-crystal structure analysis show that the iron(II) spin centers for all complexes are in the high spin state at high temperatures. While the magnetic data of air-dried samples confirm the [HS-HS] state for C1 and C2 down to very low temperature, for C3, a gradual spin crossover is observed below 150 K. The crystal structure of C3·THF at 100 K shows that a spin transition from [HS-HS] to an intermediate state takes place, which is a 1:1 mixture of discrete [HS-HS] and [LS-LS] molecules, as identified unambiguously by crystallography. The different SCO properties of C1–C3 can be attributed to crystal packing effects in the solid state.

Involved external institutions

Johannes Gutenberg-Universität Mainz (JGU)

Germany (DE)

How to cite

APA:

Fuermeyer, F., Carrella, L.M., & Rentschler, E. (2020). 2d layer arrangement of solely [hs-hs] or [ls-ls] molecules in the [hs-ls] state of a dinuclear fe(Ii) spin crossover complex. Crystals, 10(6). https://doi.org/10.3390/cryst10060448

MLA:

Fuermeyer, Fabian, Luca M. Carrella, and Eva Rentschler. "2d layer arrangement of solely [hs-hs] or [ls-ls] molecules in the [hs-ls] state of a dinuclear fe(Ii) spin crossover complex." Crystals 10.6 (2020).

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