Crystal and molecular structure of dichlorodioxobis(triphenylphosphine oxide)uranium(VI)

The crystal structure of [UO2Cl2(PPh3O2)] has been determined from three-dimensional X-ray diffraction data. Crystals are triclinic, space group P1, with a = 10.0101(6), b = 10.2589(9), c = 9.2347(8) Å, α = 110.093(6), β = 92.129(6), and γ = 78.384(6)°, and Z = 1. The structure has been solved by the heavy-atom method from counter data, and refined by least squares to a final R of 0.054. The co-ordination polyhedron around uranium is a distorted octahedron, with a linear uranyl group (U-O 1.764 Å) perpendicular to a plane in which the two chloride and two oxide ions trans to each other occupy the corners of a rectangle (U-O 2.300; U-Cl 2.645 Å).