In the title compound, C(17)H(19)NO(3), the mol-ecule has an E configuration with respect to the C=N bond and the dihedral angle between the aromatic rings is 56.07 (5)°. In the crystal, inversion dimers linked by pairs of C-H⋯O hydrogen bonds occur. The dimers are linked by weak C-H⋯π inter-actions, forming a three-dimensional network.

In the title compound, C(6)H(10)N(3) (+)·C(7)H(3)N(2)O(6) (-)·2H(2)O, the amino-pyrimidine mol-ecule is protonated at one of the pyrimidine N atoms. The carboxyl-ate group of the 3,5-dinitro-benzoate anion inter-acts with the protonated pyrimidine N atom and the 2-amino group through a pair of N-H⋯O hydrogen bonds, forming an R(2) (2)(8) motif. Two inversion-related pyrimidine rings are linked ...

The -SCH(2)CH(2)CH(2)CH(2)S- portion of the title compound, C(12)H(14)N(2)S(2), adopts an extended zigzag conformation. The angles at the tetra-hedral carbon atoms are marginally increased [113.63 (12)° and 111.38 (17)° for S-C-C and C-C-C respectively] from the idealized tetra-hedral angle. The mol-ecule lies on an inversion center located at the mid-point of the butyl chain. In the crystal, t...

In the title compound, C(12)H(9)BrN(2)OS, the dihedral angle between the aromatic rings is 10.0 (2)°. In the crystal structure, inversion dimers linked by pairs of N-H⋯O hydrogen bonds occur, generating R(2) (2)(8) loops. Weak aromatic π-π stacking [centroid-centroid separations = 3.825 (3) and 3.866 (3) Å] also occurs.

In the title compound, C(17)H(18)BrN(3)O(2)S, the dihedral angle between the aromatic rings is 9.15 (17)°. A bifurcated intra-molecular N-H⋯(N,O) hydrogen bond generates two S(5) rings and a weak intra-molecular C-H⋯S inter-action completes an S(6) ring motif. In the crystal, inversion dimers linked by pairs of N-H⋯S hydrogen bonds generate R(2) (2)(8) loops and weak C-H⋯S and C-H⋯π inter-actio...

In the title compound, C(12)H(9)ClN(2)OS, the dihedral angle between the aromatic rings is 9.78 (11)°. In the crystal structure, inversion dimers linked by pairs of N-H⋯O hydrogen bonds occur, generating R(2) (2)(8) loops. Weak aromatic π-π stacking [centroid-centroid separations = 3.7210 (15) and 3.8706 (15) Å] also occurs.

In the title compound, C29H19F3N2, the tetra-cyclic ring system is essentially planar [maximum deviation from the best plane = 0.076 (1) Å] and makes dihedral angles of 78.10 (5) and 33.71 (4)° with the methyl-phenyl and fluoro-phenyl rings, respectively. An intra-molecular C-H⋯π inter-action occurs. In the crystal, pairs of C-H⋯π inter-actions link inversion-related mol-ecules.

In the title compound, C(25)H(30)O(6), the two fused cyclo-hexa-none rings have envelope conformations, whereas the central pyran ring is roughly planar [mximum deviation = 0.045 (2) Å]. The pyran and benzene rings are almost perpendicular to each other, making a dihedral angle of 86.32 (2)°. In the crystal, molecules are linked via pairs of O-H⋯O hydrogen bonds, forming inversion dimers.

In the title compound, C16H14O4, the benzene rings are inclined to one another by 4.91 (7)°. The conformation about the C=O and C=C bonds is trans and cis, respectively. In the crystal, mol-ecules are linked by O-H⋯O hydrogen bonds, forming inversion dimers with an R 2 (2)(14) ring motif. The dimers are linked via O-H⋯O and C-H⋯O hydrogen bonds, forming undulating two-dimensional networks lying...

In the title compound, C(19)H(21)ClOS(2), the dithiane ring adopts a chair conformation. The dihedral angle between the benzene rings is 87.88 (4)°. In the crystal, inversion dimmers linked by pairs of C-H⋯O inter-actions occur.