Acta Cryst. (2009). E65, o288-o289  [ doi:10.1107/S1600536809000907 ]

Hydronium (3-oxo-1-phosphono-1,3-dihydroisobenzofuran-1-yl)phosphonate

C. Barbey, P. Retailleau, E. Guénin and N. Dupont

Abstract: In the title compound, H₃O⁺·C₈H₇O₈P₂^-, the anions form inversion dimmers by way of pairs of O-HO hydrogen bonds involving the phosphonic functions and via the hydronium cation. Further O-HO links involving the hydronium cation play a prominant part in the cohesion of the crystal structure by building bridges between bisphosphonate pairs, forming infinite ribbons along the b-axis direction and by cross-linking these ribbons perpendicularly along the a-axis direction, forming an infinite three-dimensional hydrogen-bond network. The benzene ring and the C=O atoms of the furan ring are disordered over two sets of positions of equal occupancy.

Online 10 January 2009

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