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

1
MacDiarmid Institute, School of Physical and Chemical Science, University of Canterbury, Private Bag 4800, Christchurch 8041, New Zealand
2
CNRS, CRPP, UMR 5031, F-33600 Pessac, France
3
Univ. Bordeaux, CRPP, UMR 5031, F-33600 Pessac, France
4
CNRS, ICMCB, UMR 5026, F-33600 Pessac, France
5
Univ. Bordeaux, ICMCB, UMR 5026, F-33600 Pessac, France
*
Authors to whom correspondence should be addressed.
Magnetochemistry 2019, 5(2), 22; https://doi.org/10.3390/magnetochemistry5020022
Received: 19 January 2019 / Revised: 26 February 2019 / Accepted: 7 March 2019 / Published: 1 April 2019
(This article belongs to the Special Issue Spin-Crossover Beyond the Immediate Tribute)
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Abstract

We report herein on five new Fe(II) complexes of general formula [Fe(L)2(NCCH3)2](BF4)2xCH3CN (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. View Full-Text
Keywords: spin crossover; Fe(II); supramolecular chemistry; solution-state SCO; molecular magnetism; crystallography spin crossover; Fe(II); supramolecular chemistry; solution-state SCO; molecular magnetism; crystallography
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Wilson, B.H.; Scott, H.S.; Archer, R.J.; Mathonière, C.; Clérac, R.; Kruger, P.E. Solution-State Spin Crossover in a Family of [Fe(L)2(CH3CN)2](BF4)2 Complexes. Magnetochemistry 2019, 5, 22.

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