A new polymorph of the title compound, CHNO, was obtained by recrystallization of the commercial product from a water/ethanol mixture (1:1 /). Crystals of the previously reported racemic and homochiral forms of 2-phenyl-butyramide were grown from water-aceto-nitrile solution in 1:1 volume ratio [Khrustalev (2014 ▸). , 3360-3369]. While the previously reported racemic and enanti-opure forms of the title compound adopt very similar supra-molecular structures (hydrogen-bonded ribbons), the new racemic polymorph is stabilized by a single N-H⋯O hydrogen bond that links mol-ecules into chains along the -axis direction with an anti-parallel (centrosymmetric) packing in the crystal. Hirshfeld mol-ecular surface analysis was employed to compare the inter-molecular inter-actions in the polymorphs of the title compound.
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| http://dx.doi.org/10.1107/S2056989019007011 | DOI Listing |
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