organic compounds
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In the title compound, C27H24N2O3, the pyrroldine ring adopts a twist conformation, while the six-membered pyranone ring of the coumarin ring system is in a sofa conformation. In the crystal, pairs of N—HO hydrogen bonds link the molecules into inversion R22(8) dimers. These dimers are further connected via C—HO hydrogen bonds.
organic compounds
Open access
In the title compound, C18H15NO2, the dihedral angle between the two benzene rings is 74.8 (1)°. The carbonitrile chain is almost linear, the C—C—N angle being 176.2 (2)°. In the crystal, π–π interactions [centroid–centroid distance = 3.842 (1) Å] are observed.
organic compounds
Open access
In the title compound, C24H19ClN2O3S, the sulfonyl-bound benzene ring forms dihedral angles of 38.1 (2) and 81.2 (1)°, respectively, with the formyl benzene and benzene rings. The molecular conformation is stabilized by a weak intramolecular C—HO hydrogen bond, which generates an S(5) ring motif. The crystal packing is stabilized by C—HO hydrogen bonds, which generate C(7) zigzag chains along [010] and R33(19) ring motifs along [010]. The crystal packing is further stabilized by C—Clπ interactions [Clcentroid = 3.456 (2) Å and C—Clcentroid = 173.4 (2)°].
organic compounds
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The C=C bond in the title compound, C15H15NO4S, has a Z configuration. The thiazolidine ring is essentially planar [maximum deviation = 0.008 (1) Å for the N atom] and is oriented at a dihedral angle of 59.1 (1)° with respect to the benzene ring. In the crystal, pairs of C—HO hydrogen bonds link centrosymmetrically related molecules into dimers, generating R22(18) ring motifs. The crystal packing is further stabilized by C—Hπ and C—Oπ [Ocentroid = 3.412 (2) Å and C—Ocentroid = 115.0 (1)°] interactions.
organic compounds
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The title compound, C19H18O5, crystallizes with two independent molecules (A and B) in an asymmetric unit in both of which the two aromatic rings are in a bisectional orientation as evidenced by the dihedral angle between them [41.7 (1)° in molecule A and 35.6 (1)° in molecule B]. Both molecules adopt an E configuration with respect to the C=C bond. An intramolecular C—HO hydrogen-bond occurs in molecule A. The crystal packing features intermolecular C—HO interactions.