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

Abstract

The crystal structure of [UO₂Cl₂(PPh₃O₂)] has been determined from three-dimensional X-ray diffraction data. Crystals are triclinic, space group P, 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).