Abstract
In the title compound, C19H16O3, the dihedral angle between the naphthalene ring system and the phenyl ring is 68.32 (5)°. The bridging carbonyl C—C(=O)—C plane makes a dihedral angle of 54.32 (5)° with the naphthalene ring system and 21.45 (6)° with the phenyl ring. An intermolecular C—H⋯O hydrogen bond exists between the H atom of one methoxy group and the O atom of the second methoxy group in an adjacent molecule. The crystal packing is additionally stabilized by a weak C—H⋯O intermolecular interaction between an H atom of the naphthalene ring and the O atom of the carbonyl group.
Highlights
We reported the crystal structure analysis of the corresponding β-isomers of 3aroyl-2,7-dimethoxynaphthalenes such as 2-(4-chlorobenzoyl)-3,6-dimethoxynaphthalene (Nakaema, Okamoto et al, 2008) and (4-fluorophenyl) (3,6-dimethoxy-2-naphthyl)methanone (Watanabe et al, 2010)
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
The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2
Summary
R factor = 0.034; wR factor = 0.098; data-to-parameter ratio = 13.5. Symmetry codes: (i) x þ 2; y; z þ 1; (ii) x 1; y; z 1. C19H16O3, the dihedral angle between the naphthalene ring system and the phenyl ring is 68.32 (5). The bridging carbonyl C—C( O)—C plane makes a dihedral angle of 54.32 (5) with the naphthalene ring system and. An intermolecular C—H O hydrogen bond exists between the H atom of one methoxy group and the O atom of the second methoxy group in an adjacent molecule. The crystal packing is stabilized by a weak C—H O intermolecular interaction between an H atom of the naphthalene ring and the O atom of the carbonyl group
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