Abstract
In the title compound, C19H15BrO3, the dihedral angle between the naphthalene ring system and the benzene ring is 62.51 (8)°. The bridging carbonyl C—C(=O)—C plane makes dihedral angles of 47.07 (6)° with the naphthalene ring system and 24.20 (10)° with the benzene ring. A weak intermolecular C—H⋯O hydrogen bond exists between the H atom of one methoxy group and the O atom of the other methoxy group in an adjacent molecule. The crystal packing is additionally stabilized by two types of weak intermolecular interactions involving the Br atom, C—H⋯Br and Br⋯O [3.2802 (14) Å].
Highlights
The crystal packing is stabilized by two types of weak intermolecular interactions involving the Br atom, C—H Br and Br O
We reported the crystal structure analysis of the corresponding β-isomers of 3-aroyl-2,7-dimethoxynaphthalenes such as 2-(4-chlorobenzoyl)-3,6-dimethoxynaphthalene (Nakaema et al, 2008) and (3,6-dimethoxy-2naphthyl)(4-fluorophenyl)methanone (Watanabe et al, 2010b)
The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry
Summary
R factor = 0.032; wR factor = 0.086; data-to-parameter ratio = 14.0. C19H15BrO3, the dihedral angle between the naphthalene ring system and the benzene ring is 62.51 (8). The bridging carbonyl C—C( O)—C plane makes dihedral angles of 47.07 (6) with the naphthalene ring system and 24.20 (10) with the benzene ring. A weak intermolecular C—H O hydrogen bond exists between the. H atom of one methoxy group and the O atom of the other methoxy group in an adjacent molecule. The crystal packing is stabilized by two types of weak intermolecular interactions involving the Br atom, C—H Br and Br O [3.2802 (14) Å]
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