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The title compound, C27H28N2O, is a lophine (2,4,5-triphenyl-1H-imidazole) derivative with an n-pentyl chain on the amine N atom and a 4-meth­oxy substituent on the benzene ring. The two phenyl and meth­oxy­benzene rings are inclined to the imidazole ring at angles of 25.32 (7), 76.79 (5) and 35.42 (7)°, respectively, while the meth­oxy substituent lies close to the plane of its benzene ring, with a maximum deviation of 0.126 (3) Å for the meth­oxy C atom. In the crystal, inversion dimers linked by pairs of C—H...O hydrogen bonds generate R22(22) loops. These dimers are stacked along the a-axis direction.

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In the title compound, C21H21BrClNO4, the dihydro­pyridine ring adopts a flattened boat conformation. The 3-bromo-5-chloro-2-hy­droxy­phenyl ring forms a dihedral angles of 84.44 (7)° with the dihydro­pyridine mean plane. The mol­ecular conformation is stabilized by an intra­molecular O—H...O hydrogen bond, with an S(8) ring motif. In the crystal, O—H...O and C—H...O hydrogen bonds link the mol­ecules, forming a three-dimensional network.

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In the title compound, C19H17NO2, the dihedral angle between the benzene ring and the naphthalene ring system is 9.72 (5)°, while the torsion angle of the C—N—C—C bridging group is 179.24 (17)°. The methyl group of the 1-phenyl­ethanol moiety is disordered over two positions with a refined occupancy ratio of 0.775 (5):0.225 (5). The mol­ecular conformation is stabil­ized by an intra­molecular N—H...O hydrogen bond, which generates an S(6) ring motif. In the crystal, mol­ecules are linked by O—H...O hydrogen bonds, forming zigzag chains propagating along the c-axis direction. Neighbouring chains are linked via C—H...O inter­actions, forming a two-dimensional slab-like network parallel to the bc plane.

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The mol­ecular conformation of the title compound, C13H8BrFN2O3, is essentially planar, with maximum deviations of 0.076 (1) and −0.080 (2) Å for the O atoms of the NO2 group. The mol­ecular conformation is stabilized by an intra­molecular O—H...N hydrogen bond, forming an S(6) ring motif. In the crystal, pairs of mol­ecules are linked via two pairs of C—H...O hydrogen bonds, forming inversion dimers that enclose R22(7)R22(10)R22(7) ring motifs.

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In the title mol­ecule, C14H15NO3, the ring system is essentially planar, with an r.m.s. deviation of 0.003 Å. The atoms of the ethane-1,2-diol group were refined as disordered over two sets of sites in a ratio of 0.815 (3):0.185 (3). The mol­ecular conformation is stabilized in part by an intra­molecular N—H...O hydrogen bond, which forms an S(6) ring. In the crystal, mol­ecules are connected by N—H...O and O—H...O hydrogen bonds, forming a two-dimensional network parallel to (100). The network also features weak C—H...O hydrogen bonds. Weak C—H...π inter­actions also observed.
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