A family of methoxide-bridged Cu(II) compounds with N-heterocyclic ligands: dimers and chains
Three new methoxide-bridged Cu(II) dimers are reported: tetrakis(2-methylpyrazine)di(μ-methoxy)diperchloratodicopper(II) (1), tetrakis(2-amino-5-iodopyridine)dibromide-di-μ-methoxydicopper(II) tetramethanol (2) and catena[(2-amino-5-methylpyridine)μ-bromido-μ-methoxycopper(II) (3). The compounds were characterized by single-crystal X-ray diffraction and variable temperature magnetic measurements. All three compounds crystallize in the triclinic space group P-1, and the dimers lie across a crystallographic inversion center. The dimers in 3 are further bridged into an alternating chain motif via semi-coordinated Cu(II)/Br interactions. All three compounds exhibit strong antiferromagnetic interactions with J/kB = −348(8) K for 1, and the exchange in 2 and 3 being too strong to estimate from the available data. The magnetic data for 1-3 are dominated by trace paramagnetic impurities at temperatures below 200 K. Correlation of the structures with the observed magnetic behavior is proposed. © 2023 Informa UK Limited, trading as Taylor & Francis Group.
Journal of Coordination Chemistry
Araujo-Martinez, Alma P.; Faber, Kesli; Dickie, Diane A.; Landee, Christopher P.; Turnbull, Mark M.; Twamley, Brendan; and Huynh, Nathan, "A family of methoxide-bridged Cu(II) compounds with N-heterocyclic ligands: dimers and chains" (2023). Chemistry. 13.