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[(VIVO)2MII5] (M = Ni, Co) Anderson Wheels
preprintsubmitted on 03.06.2021, 09:13 and posted on 04.06.2021, 06:27 by Hector Fraser, Emily Payne, Arup Sarkar, Lucinda Wilson, Dmitri Mitcov, Gary Nichol, Rajaraman Gopalan, Stergios Piligkos, Euan Brechin
Heterometallic Anderson wheels of formula [(VIVO)2MII5(hmp)10Cl2](ClO4)2·2MeOH (M = Ni, 1; Co, 2) have been synthesised from the solvothermal reaction of M(ClO4)2·6H2O and VCl3 with hmpH (2-(hydroxymethyl)pyridine). The metallic skeleton describes a centred hexagon, with the two vanadyl ions sitting on opposing sides of the outer ring. Magnetic susceptibility and magnetisation measurements indicate the presence of both ferromagnetic and antiferromagnetic exchange interactions. Theoretical calculations based on density functional methods reproduce both the sign and strength of the exchange interactions found experimentally, and rationalise the parameters extracted.