Novel cationic 1,2,4-selenadiazoles: synthesis via addition of 2-pyridylselenyl halides to unactivated nitriles, structures and four-center SeN contacts.
Victor N KhrustalevMaria M GrishinaZhanna V MatsulevichJulia M LukiyanovaGalina N BorisovaVladimir K OsmanovAlexander S NovikovAnatoly A KirichukAlexander V BorisovEuro SolariAlexander G TskhovrebovPublished in: Dalton transactions (Cambridge, England : 2003) (2021)
2-Pyridylselenyl halides undergo facile coupling with a triple CN bond of unactivated nitriles. Unprecedented heterocyclization allowed the preparation of a novel class of cationic 1,2,4-selenadiazoles in remarkably high yields. Cationic 1,2,4-selenadiazoles form supramolecular dimers in the crystal via SeN chalcogen bonding, which was studied theoretically.