Acta Crystallographica Section E

Structure Reports Online

Volume 68, Part 11 (November 2012)

organic compounds

Acta Cryst. (2012). E68, o3235-o3236    [ doi:10.1107/S1600536812044091 ]


P. P. Molokoane, M. Schutte and G. Steyl

Abstract: The title compound, C10H15NO2, crystallized with three mol­ecules in the asymmetric unit. These three mol­ecules are quite similar except for slight differences in the torsion angles of the substituents on the ring. The isopropyl C-C-N-C torsion angles (towards the carbon next to the ethyl bound carbon), for example, are -150.63 (11), -126.77 (13) and -138.76 (11)° for mol­ecules A, B and C, respectively, and the C-C-C-N torsion angles involving the ethyl C atoms are 102.90 (13), 87.81 (14) and 86.47 (13)°. The main difference between the three mol­ecules lies in the way they are arranged in the solid-state structure. All three mol­ecules form dimers that are connected through strong O-H...O hydrogen bonds with R22(10) graph-set motifs. The symmetry of the dimers formed does however differ between mol­ecules. Mol­ecules B connect with each other to form inversion dimers. Mol­ecules A and C, on the other hand, form dimers with local twofold symmetry, but the two mol­ecules are crystallographically distinct. The B and C molecules are linked to themselves and to each other via C-H...O hydrogen bonds. This results in the formation of a three-dimensional network structure.

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