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Phenyl quinoxalin-2-yl ether.

ABSTRACT: The aromatic ring systems in the title compound, C(14)H(10)N(2)O, form a dihedral angle of 63.8?(1)°, resulting in an opening up of the ether-O atom angle to 118.2?(1)°.

SUBMITTER: Hassan ND

PROVIDER: S-EPMC2960479 | biostudies-literature | 2008 Aug

REPOSITORIES: biostudies-literature

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Phenyl quinoxalin-2-yl ether.

Hassan Nor Duha ND Tajuddin Hairul Anuar HA Abdullah Zanariah Z Ng Seik Weng SW

Acta crystallographica. Section E, Structure reports online 20080823 Pt 9

The aromatic ring systems in the title compound, C(14)H(10)N(2)O, form a dihedral angle of 63.8 (1)°, resulting in an opening up of the ether-O atom angle to 118.2 (1)°. ...[more]

PMID: 21201795

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A second monoclinic modification of phenyl quinoxalin-2-yl ether.

Project description:The two aromatic systems in the title compound, C(14)H(10)N(2)O, enclose a dihedral angle of 77.9 (1)°, and the C-O-C inter-ring bond angle is 117.6 (1)°.

| S-EPMC2959563 | biostudies-literature

Quinoxalin-2-yl o-tolyl ether.

Project description:The dihedral angle between the two aromatic ring systems in the title compound, C(15)H(12)N(2)O, is 85.9?(1)°; The angle at the O atom is widened to 118.2?(2)°. The quinoxalin-yloxy part of the mol-ecule lies on a mirror plane and the tolyl group is disordered over two positions about the mirror plane.

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Quinoxalin-2-yl m-tolyl ether.

Project description:The dihedral angle between the two aromatic ring systems in the title compound, C(15)H(12)N(2)O, is 79.4?(1)°. The angle at the O atom is widened to 116.93?(9)°.

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Quinoxalin-2-yl p-tolyl ether.

Project description:The dihedral angle between the two aromatic ring systems in the title compound, C(15)H(12)N(2)O, is 42.6?(1)°. The angle at the O atom is widened to 117.7?(1)°.

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1-Naphthyl quinoxalin-2-yl ether.

Project description:In the crystal structure of the title compound, C(18)H(12)N(2)O, the dihedral angle between the two fused-ring systems is 84.3 (1) °; the C-O-C angle at the ether O atom is 117.31 (18)°.

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2-Naphthyl quinoxalin-2-yl ether.

Project description:In the crystal structure of the title compound, C(18)H(12)N(2)O, the two fused rings are aligned at 64.2 (1)°; the C-O-C angle is 118.73 (12)°.

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N'-(3-Methyl-quinoxalin-2-yl)-N'-phenyl-benzohydrazide.

Project description:In the crystal structure of the title compound, C(22)H(18)N(4)O, the quinoxaline system makes dihedral angles of 86.59?(7) and 63.37?(9)° with the benzohydrazide and phenyl rings, respectively. The benzohydrazide ring makes a dihedral angle of 72.46?(10)° with the phenyl ring. The crystal structure is stabilized by inter-molecular N-H?O hydrogen bonds, C-H?O contacts and C-H?? inter-actions.

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3-Nitro-phenyl pyrimidin-2-yl ether.

Project description:In the title compound, C(10)H(7)N(3)O(3), the dihedral angle between the two aromatic rings is 87.5 (1) Å; their ipso-C atoms subtend an angle of 117.4 (1)° at the ether O atom.

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Bis[4-(chloro-acet-yl)phenyl] ether.

Project description:The title compound, C(16)H(12)Cl(2)O(3), crystallizes with two independent mol-ecules in the asymmetric unit. The dihedral angles between the planes of the benzene rings in the two independent mol-ecules are 68.65 (2) and 68.47 (3)°. The short distance of 3.899 (5) Å between the centroids of the benzene rings of neighbouring mol-ecules indicate π-π inter-actions. The crystal structure is stabilized by a network of intermolecular C-H⋯O hydrogen bonds.

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(Phen-yl)(3-phenyl-sulfonyl-1,2-dihydro-pyrrolo-[1,2-a]quinoxalin-1-yl)methanone.

Project description:In the title mol-ecule, C(24)H(18)N(2)O(3)S, the 13-atom ring system comprising the quinoxaline and fused five-membered ring exhibits an r.m.s. deviation from coplanarity of 0.039 Å, with a maximum deviation of 0.0710 (10) Å for the PhCO-bearing C atom of the five-membered ring. The 10-membered C(8)N(2) quinoxaline ring system has an r.m.s. deviation from coplanarity of 0.022 Å, with a maximum deviation of 0.0403 (9) Å for the C atom involved in the C=C bond in the five-membered ring. The three atoms of the five-membered ring fused to the quinoxaline ring system show deviations of up to 0.118 (2) Å for the PhCO-bearing C atom. C-N bond distances in the quinoxaline ring system of the title mol-ecule deviate from those in unsubstituted quinoxaline. In particular, the two C-N distances to the N atom involved in the five-membered ring are essentially equal, with values of 1.3786 (17) and 1.3773 (16) Å, unlike the difference of nearly 0.06 Å in quinoxaline.

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