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Acta Cryst. (2005). E61, o1153-o1155 [ doi:10.1107/S1600536805009189 ]
Abstract: In 3-methylanilinium picrate (3-MAP), C7H10N+·C6H2N3O7-, one of the nitro groups in the picrate ion is rotationally disordered with site occupancy factors of 0.80 and 0.20. The expected proton transfer took place between picric acid and 3-methylaniline, and the amine group is hydrogen bonded to two of the phenolate O atoms. The ortho-nitro groups deviate greatly from the benzene plane of the picrate ion, facilitating hydrogen-bond formation. While the cations are stacked as columns along the [001] direction, the anions are stacked in an offset fashion.
Online 31 March 2005
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