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A Neutral Fe 4 t Bu L 4 All Ferric Grid Complex: Structural and Variable Temperature Magnetic Properties
Author(s) -
Bonanno Nico M.,
Patrick Brian O.,
Seda Takele,
Lemaire Martin T.
Publication year - 2020
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201901316
Subject(s) - chemistry , ferric , electron paramagnetic resonance , antiferromagnetism , mössbauer spectroscopy , crystallography , atmospheric temperature range , magnetic susceptibility , spectroscopy , analytical chemistry (journal) , inorganic chemistry , nuclear magnetic resonance , condensed matter physics , physics , quantum mechanics , chromatography , meteorology
A neutral all ferric [2×2] grid complex Fe 4 t Bu L 4 1 was synthesized and characterized in the solid‐state by X‐ray crystallography, variable temperature magnetic susceptibility and Mössbauer spectroscopy. The absence of any coordinate bond or other structural changes between 90(2) and 320(2) K indicated no changes to the electronic structure of 1 occurred in the solid‐state over this temperature range. Variable temperature magnetic susceptibility data were fitted to an isotropic spin Hamiltonian model and suggested weak antiferromagnetic exchange coupling between the high‐spin ferric ions ( J = –16.1 cm ‐1 ). Mössbauer spectroscopy parameters ( δ = 0.416(9) mm s –1 & ΔE Q = 0.87(7) mm s ‐1 ), powder EPR spectra, and broken symmetry density functional theory calculations supported the high‐spin ferric oxidation state assignment.