Abstract
The title complex, bis(tetraphenylphosphonium) dioxobis(pyridine-2,6-dicarbothioato-O,N,O')uranium(VI), (C(24)H(20)P)(2)[UO(2)(C(7)H(3)NO(2)S(2))(2)], was prepared by reacting two equivalents of pyridine-2,6-bis(monothiocarboxylate) (pdtc) with uranyl nitrate. The geometry of the eight-coordinate U atom is hexagonal bipyramidal, with the uranyl O atoms in apical positions. This is the first reported complex in which this ligand binds a metal through the O and not the S atoms. Principal bond lengths include uranyl lengths of 1.774 (2) A, U--O distances of 2.434 (2) and 2.447 (3) A, and two U--N distances of 2.647 (3) A. The anion lies on an inversion centre.
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