Acta Cryst. (2005). E61, m881-m884  [ doi:10.1107/S1600536805009682 ]

(C₃H₁₂N₂)₂[UO₂(H₂O)₂(SO₄)₂]₂·2H₂O: an organically templated uranium sulfate with a novel dimer type

M. B. Doran, A. J. Norquist and D. O'Hare

Abstract: The title compound, bis(propane-1,2-diaminium) tetraaquadi-₂-sulfato-disulfatotetraoxodiuranate(VI) dihydrate, (C₃H₁₂N₂)₂[U₂O₄(SO₄)₄(H₂O)₄]·2H₂O, contains discrete centrosymmetric anionic {[UO₂(H₂O)₂(SO₄)₂]₂}^4- dimers with C₃H₁₂N₂²⁺ cations balancing the charge. The dimers form hydrogen-bonded layers. The cations and occluded water molecules participate in an extensive hydrogen-bonding network. Each U^VI centre is seven-coordinate with a pentagonal-bipyramidal geometry. Both pendent and bridging sulfate tetrahedra are observed, as well as bound and occluded water molecules.

Online 16 April 2005

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