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MDPI, Magnetochemistry, 2(5), p. 22, 2019

DOI: 10.3390/magnetochemistry5020022

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Solution-State Spin Crossover in a Family of [Fe(L)2(CH3CN)2](BF4)2 Complexes

Journal article published in 2019 by Benjamin Wilson ORCID, Hayley Scott, Rosanna Archer, Corine Mathonière, Rodolphe Clérac, Paul Kruger ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We report herein on five new Fe(II) complexes of general formula [Fe(L)2(NCCH3)2](BF4)2•xCH3CN (L = substituted 2-pyridylimine-based ligands). The influence of proximally located electron withdrawing groups (e.g., NO2, CN, CF3, Cl, Br) bound to coordinated pyridylimine ligands has been studied for the effect on spin crossover in their Fe(II) complexes. Variable-temperature UV-visible spectroscopic studies performed on complexes with more strongly electronegative ligand substituents revealed spin crossover (SCO) in the solution, and thermodynamic parameters associated with the spin crossover were estimated.