Regioselective interaction of bifunctional o-quinone, annulated with dithiete cycle, and Ni(CO)4. New heterospin bis(o-semiquinonato) nickel complexes

• Published in: Polyhedron Vol. 210; p. 115512
• Main Authors: Martyanov, K.A., Kuropatov, V.A., Baranov, E.V., Arsenyev, M.V., Bogomyakov, A.S., Cherkasov, V.K.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2021
• Subjects: 1,2-dithiete; Ambident ligands; Dioxolene ligands; Nickel; Redox-active ligands; Nickel; Redox-active ligands; 1,2-dithiete; Dioxolene ligands; Ambident ligands
• ISSN: 0277-5387
• DOI: 10.1016/j.poly.2021.115512

Interaction of Ni(CO)4 and bifunctional o-quinone, annulated with dithiete cycle, results in regioselective binding of nickel ion by dioxolene site. [Display omitted] Regioselective activation of dioxolene coordination site was observed in reactions of Ni(CO)4 and bifunctional o-quinone, annulated with dithiete cycle (ditQ). Novel hexacoordinated bis(o-semiquinonato) nickel complexes Ni(ditSQ)2(THF)2 (1), Ni(ditSQ)2(Py)2 (2), Ni(ditSQ)2(2,2′-bpy) (3) and Ni(ditSQ)2(4-NIT-Py)2 (4) (4-NIT-Py = 2-(4-pyridinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) were obtained. X-ray diffractometry study revealed a distorted octahedral geometry with trans-arrangement of neutral monodentate ligands for Ni ion. Ferromagnetic metal–ligand and antiferromagnetic ligand–ligand exchange interactions were observed in obtained heterospin systems.