Mp. Neu et al., Actinide interactions with microbial chelators: the dioxobis[pyridine-2,6-bis(monothiocarboxylato)]uranium(VI) ion, ACT CRYST C, 57, 2001, pp. 240-242
The title complex, bis(tetraphenylphosphonium) dioxobis(pyridine-2,6-dicarb
othioato-O,N,O')uranium(VI), (C24H20P)(2)-[UO2(C7H3NO2S2)(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 hexag
onal 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
) Angstrom, U-O distances of 2.434 (2) and 2.447 (3) Angstrom, and two U-N
distances of 2.647 (3) Angstrom. The anion lies on an inversion centre.