Download citation
Download citation

link to html
In the title mol­ecule, C24H21NO2, the dihedral angle between the carbazole ring system [with a maximum deviation of 0.052 (2) Å] and the benzene ring is 38.6 (1)°. In the crystal, weak bifurcated (C—H)2...O hydrogen bonds link the mol­ecules into chains along [100].

Download citation
Download citation

link to html
The asymmetric unit of the title compound, C21H16ClNO4, contains two independent mol­ecules (A and B), each adopting a conformation wherein the isoxazole ring is roughly orthogonal to the anthrone ring. The dihedral angle between the mean plane of the isoxazole (all atoms) and the mean plane of the anthrone (all atoms) is 88.48 (3)° in one mol­ecule and 89.92 (4)° in the other. The ester is almost coplanar with the isoxazole ring, with mean-plane dihedral angles of 2.48 (15) and 8.62 (5)°. In both mol­ecules, the distance between the ester carbonyl O atom and the anthrone ketone C atom is about 3.3 Å. The anthrone ring is virtually planar (r.m.s. deviations of 0.070 and 0.065 Å) and adopts a shallow boat conformation in each mol­ecule, as evidenced by the sum of the six intra-B-ring torsion angles [41.43 (15) and 34.38 (15)° for molecules A and B, respectively]. The closest separation between the benzene moieties of anthrones A and B is 5.1162 (7) Å, with an angle of 57.98 (5)°, consistent with an edge-to-face π-stacking inter­action. In the crystal, weak C—H...O and C—H...N inter­actions link the mol­ecules, forming a three-dimensional network.

Download citation
Download citation

link to html
In the title mol­ecule, C21H20N2O2S, the dihedral angle between the mean plane of the carbazole ring system [maximum deviation = 0.021 (4) Å] and the benzene ring is 80.15 (6)°. In the crystal, mol­ecules are linked by N—H...O and weak C—H...O hydrogen bonds into a C(8) chain along [001].

Download citation
Download citation

link to html
The title compound, C25H27NO4, has a flattened di­hydro­pyridine ring. The benzene and phenyl rings are synclinal to one another, forming a dihedral angle of 49.82 (8)°; the axis of the biphenyl rings makes an 81.05 (9)° angle to the plane of the di­hydro­pyridine ring. In the crystal, N—H...O hydrogen bonds link the mol­ecules into chain motifs running along the a-axis direction. The chains are cross-linked by C—H...O inter­actions, forming sheet motifs running slightly off the (110) plane, together with an intermolecular interaction between head-to tail biphenyl groups, thus making the whole crystal packing a three-dimensional network. Intra­molecular C—H...O hydrogen bonds are also observed.
Follow Acta Cryst. E
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds