FeII Complexes with Triple N1,N2-Triazole Bridge Schiff Base Ligand: Antiferromagnetic Dimer vs. Spin Conversion Trimer

Li AM, Hochdoerffer T, Wolny JA, Schuenemann V, Rentschler E (2018)

Publication Type: Journal article

Publication year: 2018

Journal

European Journal of Inorganic Chemistry Wiley-VCH Verlag

Book Volume: 2018

Pages Range: 4190-4199

Journal Issue: 37

DOI: 10.1002/ejic.201800784

Abstract

Based on the p-tolyl functionalized Schiff base 1,2,4-triazole ligand 4-(p-tolylidene-amino)-4H-1,2,4-triazole (toltrz), a series of three triazole-bridged Fe^II complexes have been prepared. The compounds represent a range of dinuclear and trinuclear species, with µ2-N1,N2-triazole bridges linking the Fe^II centers. Mössbauer spectroscopy and magnetic susceptibility measurements reveal a gradual single-step spin crossover (SCO) behavior for the trimeric compound 3 on the central Fe^II site. Single-crystal X-ray diffraction at 120 K confirms that the central Fe^II site undergoes a HS to LS transition while the peripheral Fe^II remain in HS state (HS = high spin; LS = low spin). Compounds 1 and 2 are isostructures with different terminal ligand XCN (X = S, Se), these two compounds stay in high spin state over the whole temperature range but display weak antiferromagnetic exchange coupling.

Involved external institutions

Johannes Gutenberg-Universität Mainz (JGU)

Germany (DE) Technische Universität Kaiserslautern

Germany (DE)

How to cite

APA:

Li, A.-M., Hochdoerffer, T., Wolny, J.A., Schuenemann, V., & Rentschler, E. (2018). FeII Complexes with Triple N1,N2-Triazole Bridge Schiff Base Ligand: Antiferromagnetic Dimer vs. Spin Conversion Trimer. European Journal of Inorganic Chemistry, 2018(37), 4190-4199. https://doi.org/10.1002/ejic.201800784

MLA:

Li, Ai-Min, et al. "FeII Complexes with Triple N1,N2-Triazole Bridge Schiff Base Ligand: Antiferromagnetic Dimer vs. Spin Conversion Trimer." European Journal of Inorganic Chemistry 2018.37 (2018): 4190-4199.

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