Acta Cryst. (2007). E63, m2086  [ doi:10.1107/S1600536807028346 ]

Bis(DL-valinium) pentafluoridooxidoniobate(V)

M. A. Pushilin, A. V. Gerasimenko and R. L. Davidovich

Abstract: The asymmetric unit of the title compound [systematic name: (R)-1-carboxy-2-methylpropan-1-aminium (S)-1-carboxy-2-methylpropan-1-aminium pentafluoridooxidoniobate(V)], (C₅H₁₂NO₂)₂[NbOF₅], consists of a discrete [NbOF₅]^2- complex anion and two protonated valinium cations. The Nb atom has a distorted octahedral geometry and the Nb-F bond trans to the Nb=O bond is significantly longer than the other four Nb-F bonds in the polyhedron. The valinium cations are linked to the pentafluoridooxidoniobate(V) anions via O-HF, N-HF and N-HO hydrogen bonds.

Online 11 July 2007

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