Crystal structure of pentachloro(triphenylphosphine oxide)uranium(V)

Abstract

The structure of the title compound has been determined by single-crystal X-ray diffraction methods from diffractometer data and refined to R 0.093. Crystals are monoclinic, space group P2₁/n with a₀= 15.404(5), b₀= 13.552(5), c₀= 10.868(5)Å, β= 93.64(5)°, Z= 4. The uranium atoms are surrounded by five chlorine atoms (U–Cl 2.47–2.50 Å) and one oxygen atom (U–O 2.11 Å) at the vertices of a distorted octahedron. Results are discussed in relation to spectral properties of UCl₅·tppo, for which optical absorption bands are assigned to transitions from the Γ₇, ground state, and hexachlorouranates(V).