Acta Cryst. (2002). E58, o498-o500  [ doi:10.1107/S1600536802005743 ]

Anilinium 3-methyl-1,2-butadienyl-1,1-diphosphonate(1-)

C. M. Angelov, J. P. Heever, R. McDonald, A. J. B. McEwan and J. R. Mercer

Abstract: The title compound, C₆H₈N⁺.C₅H₉O₆P₂^-, has been prepared via hydrolysis of 3-methyl-1,2-butadiene-1,1-diphosphonic tetrakis(trimethylsilyl) ester, and stabilization of the diphosphonic acid thus formed as an anilinium salt. Both ions possess mirror symmetry, with all the C atoms of the anion and the N, ipso-C and para-C atoms of the cation being situated in the mirror plane. Adjacent anionic units form associations through cyclic dimeric {P(=O)(OH)}₂ and chain-propagating P-OHO=P interactions, with the anilinium ion being hydrogen bonded to three adjacent diphosphonate anions.

Online 5 April 2002

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