Received 5 December 2012
In the title compound, C28H24O6·CHCl3, the two 4-methoxybenzoyl groups at the 1- and 8-positions of the naphthalene ring system are aligned almost antiparallel, the benzene rings making a dihedral angle of 25.76 (7)°. The naphthalene ring system makes dihedral angles of 72.51 (7) and 73.33 (7)° with the benzene rings. In the crystal, the naphthalene molecules are linked by C-HO interactions, forming a helical chain along the b-axis direction. A C-HCl interaction is also observed between the aroylated naphthalene and chloroform molecules. The chloroform molecule is disordered over two positions with site occupancies of 0.478 (5) and 0.522 (5).
For the formation reaction of aroylated naphthalene compounds via electrophilic aromatic substitution of naphthalene derivatives, see: Okamoto et al. (2011); Okamoto & Yonezawa (2009). For structures of closely related compounds, see: Hijikata et al. (2010); Sasagawa et al. (2011).
Data collection: PROCESS-AUTO (Rigaku, 1998); cell refinement: PROCESS-AUTO; data reduction: CrystalStructure (Rigaku, 2010); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEPIII (Burnett & Johnson, 1996); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: IS5230 ).
The authors express their gratitude to Master Atsushi Nagasawa and Master Toyokazu Muto, Department of Organic and Polymer Materials Chemistry, Graduate School, Tokyo University of Agriculture & Technology, and Professor Keiichi Noguchi, Instrumentation Analysis Center, Tokyo University of Agriculture and Technology, for their technical advice. This work was partially supported by a Sasagawa Scientific Research Grant from the Japan Science Society, Tokyo, Japan.
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