Acta Cryst. (2004). E60, m631-m633  [ doi:10.1107/S1600536804008918 ]

Piperazinium aquabis(oxalato)oxovanadate(IV) sesquihydrate

L. Lin, S.-F. Wu, C.-C. Huang, H.-H. Zhang, X.-H. Huang and Z.-X. Lian

Abstract: A mononuclear V^IV complex, (C₄H₁₂N₂)[VO(C₂O₄)₂(H₂O)]·1.5H₂O, with bis(oxalate) ligands, has been synthesized under hydrothermal conditions. The structure contains aquabis(oxalato)oxovanadium(IV) complex anions, [VO(C₂O₄)₂(H₂O)]^2-, and diprotonated piperazine cations, [C₄N₂H₁₂]²⁺. The ions are connected through hydrogen bonds to form a three-dimensional network with micropores, where uncoordinated water molecules are located with the some degree of disorder. The V center has distorted octahedral geometry with one terminal O atom, four O atoms from two oxalate groups and one water O atom. The two oxalate groups are cis arranged. The V-O bond lengths are in the range 1.599  (2)-2.216  (2)  Å.

Online 24 April 2004

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