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In the title orthorhombic polymorph (space group Iba2), C17H13N, the dihedral angle between the benzene rings is 55.99 (10)° and the azepine ring adopts a boat conformation. In the crystal, molecules are linked by C—H
π contacts. The previously-reported polymorph [Yousuf et al. (2012). Acta Cryst. E68, o1101] crystallizes in the monoclinic system (space group P21/c) with two molecules in the asymmetric unit.
π contacts. The previously-reported polymorph [Yousuf et al. (2012). Acta Cryst. E68, o1101] crystallizes in the monoclinic system (space group P21/c) with two molecules in the asymmetric unit.organic compoundsOpen access
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In the title compound, C28H18N2O5, the dihedral angle between the terminal benzoate rings is 20.67 (12)°. The central oxadiazole ring is almost coplanar with its two benzene ring substituents, making dihedral angles of 4.80 (16) and 5.82 (16)°. In the crystal, pairs of C—HO hydrogen bonds form inversion dimers with R22(40) ring motifs. The structure also features C—HO, C—Hπ and π–π interactions [centroid–centroid separation = 3.695 (4) Å].
O hydrogen bonds form inversion dimers with R22(40) ring motifs. The structure also features C—HO, C—Hπ and π–π interactions [centroid–centroid separation = 3.695 (4) Å].organic compoundsOpen access
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In the title compound, C24H20N4, the azepine ring adopts a boat conformation and the dihedral angle between the benzene rings fused to it is 57.95 (8)°. The bond-angle sum at the azepine N atom is 346.6°, indicating a significant deviation from planarity. The triazole ring subtends a dihedral angle of 71.45 (10)° with the terminal phenyl group. A weak intramolecular C—HNa (a = azepine) interaction occurs, which closes an S(6) ring.
Na (a = azepine) interaction occurs, which closes an S(6) ring.organic compoundsOpen access
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The asymmetric unit of the triclinic polymorph of the title compound, C21H25N3O3, consists of two molecules, whereas for the monoclinic polymorph Z′ = 1 [Fun et al. (2009). Acta Cryst. E65, o445]. The two molecules exhibit an E configuration with respect to the C=N bond. The molecules are linked into dimers by N—HO and C—HO hydrogen bonds forming R22(8) ring motifs. In addition, π–π interactions occur between nitrophenyl groups [minimum centroid–centroid distance 3.940 (2) Å], stacking the molecules along the ac plane.
O and C—HO hydrogen bonds forming R22(8) ring motifs. In addition, π–π interactions occur between nitrophenyl groups [minimum centroid–centroid distance 3.940 (2) Å], stacking the molecules along the ac plane.organic compoundsOpen access
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In the title compound, C24H20N4, the azepine ring adopts a boat conformation. The dihedral angle between the benzene rings fused to the azepine ring is 49.40 (9)°. The triazole ring makes a dihedral angle of 77.88 (9)° with the terminal phenyl ring. In the crystal, molecules are linked via C—Hπ interactions and a parallel slipped π–π interaction [centroid–centroid distance = 3.7324 (9), normal distance = 3.4060 (6) and slippage = 1.526 Å], forming a three-dimensional network.
π interactions and a parallel slipped π–π interaction [centroid–centroid distance = 3.7324 (9), normal distance = 3.4060 (6) and slippage = 1.526 Å], forming a three-dimensional network.
