Date Published: March 01, 2012
Publisher: International Union of Crystallography
Author(s): Karuppusamy Sakthivel, Kannupal Srinivasan, Sampath Natarajan.
The asymetric unit of the title molecule, C21H20O3, contains two crystallographically independent molecules, A and B, which differ in the orientation of the ethyl group substituted on the naphthalene system; the dihedral angles between the ethyl group and the naphthalene system are 7.4 (3) and 68.1 (3)°, respectively, for molecules A and B. The dihedral angles between the benzoyl and naphthalene groups are 64.7 (7) and 69.4 (8)°, respectively, for molecules A and B. The crystal structure features four aromatic π–π stacking interactions [centroid–centroid distances = 4.181 (1), 3.891 (1), 4.423 (1) and 4.249 (1) Å].
For the biological activities of naphthalene compounds, see: Dekoning et al. (2003 ▶); Alvarez et al. (2007 ▶). For related crystal structures, see: Watanabe et al. (2010 ▶); Thenmozhi et al. (2008 ▶). For ring conformational analysis, see: Cremer & Pople (1975 ▶); Nardelli (1995 ▶).