Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 7 (July 2013)

organic compounds

Acta Cryst. (2013). E69, o1053-o1054    [ doi:10.1107/S1600536813014530 ]


P. Narayanan, J. Kamalraja, P. T. Perumal and K. Sethusankar

Abstract: The title compound, C16H15ClN2O4, contains a chiral centre and crystallizes as a racemate. The methyl­ene group [beta]-positioned to the carbonyl group is partially (21%) disordered. It flips to the opposite sides of the corresponding six-membered carbocycle by -0.304 (3) and 0.197 (11) Å, producing alternative envelope conformations. The planes of the pyran and chloro­phenyl rings form a dihedral angle of 86.25 (9)°. The mol­ecular structure is characterized by an intra­molecular N-H...O inter­action, which generates an S(6) ring motif. The corresponding amino N atom deviates from the plane of the pyran ring by 0.1634 (19) Å. In the crystal, mol­ecules are linked via C-H...O hydrogen bonds, forming C(8) chains running parallel to the b-axis direction. The crystal structure also features C-H...[pi] inter­actions.

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