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Crystal structure of 2,7-dieth-oxy-1,8-bis-(4-nitro-benzo-yl)naphthalene.

ABSTRACT: The title compound, C28H22N2O8, possesses crystallographically imposed twofold symmetry, with the two central carbon atoms of the naphthalene unit lying on the rotation axis. The two benzoyl groups in the mol-ecule are twisted away from the attached naphthalene unit with a C-C-C=O torsion angle of 49.05?(15)° between the naphthalene unit and the carbonyl group. The dihedral angle between the naphthalene ring system and the benzene ring is 77.17?(5)°. In the crystal, pairs of C-H?O=C hydrogen bonds link the mol-ecules into a double-column structure along the c axis. The mol-ecules are further linked by C-H?O=N hydrogen bonds, forming a three-dimensional network. C-H?? inter-actions between the methyl-ene group and the naphthalene unit and ?-? inter-actions between the naphthalene ring systems [centroid-centroid distances of 3.7858?(7)-3.7860?(7)?Å] are also observed.

SUBMITTER: Mohri S

PROVIDER: S-EPMC4186128 | biostudies-literature | 2014 Sep

REPOSITORIES: biostudies-literature

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Crystal structure of 2,7-dieth-oxy-1,8-bis-(4-nitro-benzo-yl)naphthalene.

Mohri Saki S Ohisa Shinji S Noguchi Keiichi K Yonezawa Noriyuki N Okamoto Akiko A

Acta crystallographica. Section E, Structure reports online 20140823 Pt 9

The title compound, C28H22N2O8, possesses crystallographically imposed twofold symmetry, with the two central carbon atoms of the naphthalene unit lying on the rotation axis. The two benzoyl groups in the mol-ecule are twisted away from the attached naphthalene unit with a C-C-C=O torsion angle of 49.05 (15)° between the naphthalene unit and the carbonyl group. The dihedral angle between the naphthalene ring system and the benzene ring is 77.17 (5)°. In the crystal, pairs of C-H⋯O=C hydrogen bon ...[more]

PMID: 25309162

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2,7-Dimeth-oxy-1,8-bis-(4-phen-oxy-benzo-yl)naphthalene.

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1,8-Bis(4-amino-benzo-yl)-2,7-dimeth-oxy-naphthalene.

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Crystal structure of 1,8-dibenzoyl-2,7-di-phen-oxy-naphthalene.

Project description:In the title compound, C36H24O4, the benzene rings of the benzoyl and phen-oxy groups make dihedral angles of 75.01?(4), 75.78?(4), 83.17?(5) and 80.84?(5)° with the naphthalene ring system. In the crystal, two types of C-H?? inter-actions between the benzene rings of the benzoyl groups and the naphthalene unit, and two kinds of ?-? inter-actions between the benzene rings, with centroid-centroid distances of 3.879?(1) and 3.696?(1)?Å, are observed.

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Project description:Mol-ecules of the title compound, C(24)H(18)N(2)O(6), are located on a twofold rotation axis passing through through the central C-C bond of the naphthalene ring system. The mol-ecular conformation is characterized by a roughly coplanar arrangement of the two substituted phenyl rings [dihedral angle 18.53?(5)°]. These two aryl rings are each twisted by 65.40?(5)° from the plane of the naphthyl unit.

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2,7-Dimethoxy--1-(4-nitro-benzo-yl)-naphthalene.

Project description:In the title compound, C(19)H(15)NO(5), the dihedral angle between the naphthalene ring system and the benzene ring is 61.97?(5)°. The dihedral between the naphthalene ring system and the bridging carbonyl C-C(=O)-C plane is 54.68?(6)°, far larger than that [12.54?(7)°] between the phenyl group and the bridging carbonyl group. The nitro group and the phenyl ring are almost coplanar [O-N-C-C torsion angle = 2.94?(19)°]. In the crystal, mol-ecules are linked by C-H?? inter-actions and the phenyl rings are involved in a centrosymmetric ?-? inter-action with a perpendicular distance of 3.523?Å and a lateral offset of 1.497?Å. In addition, weak inter-molecular C-H?O hydrogen bonds are formed between an H atom of one meth-oxy group and a nearby carbonyl O atom.

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1,8-Bis(4-fluoro-benzo-yl)naphthalen-2,7-diyl dimethane-sulfonate.

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Crystal structure and Hirshfeld surface analysis of 2-hy-droxy-7-meth-oxy-1,8-bis-(2,4,6-tri-chloro-benzo-yl)naphthalene.

Project description:In the title compound, C25H12Cl6O4, the two carbonyl groups are oriented in a same direction with respect to the naphthalene ring system and are situated roughly parallel to each other, while the two 2,4,6-tri-chloro-benzene rings are orientated in opposite directions with respect to the naphthalene ring system: the carbonyl C-(C=O)-C planes subtend dihedral angles of 45.54?(15) and 30.02?(15)° to the naphthalene ring system are. The dihedral angles formed by the carbonyl groups and the benzene rings show larger differences, the C=O vectors being inclined to the benzene rings by 46.39?(16) and 79.78?(16)°. An intra-molecular O-H?O=C hydrogen bond forms an S(6) ring motif. In the crystal, no effective inter-molecular hydrogen bonds are found; instead, O?Cl and C?Cl close contacts are observed along the 21 helical-axis direction. The Hirshfeld surface analysis reveals several weak interactions, the major contributor being Cl?H/H?Cl contacts.

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