Modulating the Magnetic Properties of Copper(II)/Nitroxyl Heterospin Complexes by Suppression of the Jahn-Teller Distortion

Sam Greatorex; Sergey V Fokin; Rafal Kulmaczewski; Mihoko Yamada; Oscar Cespedes; Nobuto Yoshinari; Takumi Konno; Stephen Sproules; Victor I Ovcharenko; Malcolm A Halcrow

doi:10.1021/acs.inorgchem.0c01345

Modulating the Magnetic Properties of Copper(II)/Nitroxyl Heterospin Complexes by Suppression of the Jahn-Teller Distortion

Inorg Chem. 2020 Jul 6;59(13):8657-8662. doi: 10.1021/acs.inorgchem.0c01345. Epub 2020 Jun 11.

Authors

Affiliations

¹ School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K.
² International Tomography Center, Siberian Branch of Russian Academy of Science, Institutskaya Strasse 3a, Novosibirsk 630090, Russia.
³ Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
⁴ Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan.
⁵ School of Physics and Astronomy, University of Leeds, EC Stoner Building, Leeds LS2 9JT, U.K.
⁶ WestCHEM, School of Chemistry, University of Glasgow, Glasgow G12 8QQ, U.K.

PMID: 32525669
DOI: 10.1021/acs.inorgchem.0c01345

Abstract

A series of six-coordinate [Cu(L)L¹][BF₄]₂ (L¹ = 2,6-bis{1-oxyl-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-2-yl}pyridine) complexes are reported. Ferromagnetic coupling between the Cu and L¹ ligand spins is enhanced by an L coligand with distal methyl substituents, which is attributed to a sterically induced suppression of its Jahn-Teller distortion.