Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 2 (February 2013)

organic compounds

Acta Cryst. (2013). E69, o305    [ doi:10.1107/S1600536813002055 ]

Phenyl acridine-9-carboxyl­ate

M. Wera, D. Trzybinski, K. Krzyminski and J. Blazejowski

Abstract: The acridine ring system and the benzene ring in the title compound, C20H13NO2, are oriented at a dihedral angle of 6.4 (2)°. The carboxyl group is twisted at an angle of 83.6 (2)° relative to the acridine skeleton. The mol­ecules in the crystal are arranged in stacks along the b axis, with two of the acridine rings involved in multiple [pi]-[pi] inter­actions [centroid-centroid distances in the range 3.536 (2)-3.894 (2) Å]. Stacks arranged parallel are linked via C-H...[pi] inter­actions, forming layers in the ac plane that are in contact with adjacent, inversely oriented layers via other C-H...[pi] inter­actions, giving rise to double layers. The inversely oriented double layers inter­act dispersively. The acridine units are parallel within the parallel-oriented stacks, but inclined at an angle of 79.6 (2)° in the inversely oriented stacks.

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