In the title mol-ecule, C(9)H(10)ClN(3)O, the dihedral angle between the pyridine ring and imidazoline ring mean plane [maximum deviation = 0.031-(3) Å] is 76.2 (1)°. In the crystal, N-H⋯O hydrogen bonds link pairs of mol-ecules to form inversion dimers. In addition, weak C-H⋯N hydrogen bonds and π-π stacking inter-actions between pyridine rings [centroid-centroid distance = 3.977 (2) Å] are ob...

In the title compound, C15H11BrO3, the dihedral angle between the benzene rings is 72.59 (6)°. In the crystal, pairs of C-H⋯π contacts form inversion dimers. Additional C-H⋯O hydrogen bonds generate R2(1)(6) ring motifs and stack these dimers along the b axis. Short inter-molecular Br⋯O contacts of 3.254 (3) Å are also observed and link the stacks into a three-dimensional network.

In the title compound, C(23)H(26)O(4), the two cyclo-hexene rings adopt envelope conformations whereas the pyran ring adopts a boat conformation. In the crystal, pairs of inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into inversion dimers.

In the title compound, C(14)H(15)NO(2)S, the two aromatic rings enclose a dihedral angle of 70.53 (10)°. A weak intra-molecular C-H⋯O hydrogen bond generates an S(6) ring motif. The crystal structure features inversion-related dimers linked by pairs of N-H⋯O hydrogen bonds.

In the title compound, C(14)H(12)ClNO(3)S, the conformation of the N-H bond in the C-SO(2)-NH-C(O) segment is anti to the C=O bond. The dihedral angle between the sulfonyl benzene ring and the -SO(2)-NH-C-O segment is 89.4 (1)° and that between the sulfonyl and benzoyl benzene rings is 89.1 (2)°. The crystal structure features inversion-related dimers linked by pairs of N-H⋯O hydrogen bonds.

In the title compound, C7H9NO2, all non-H atoms are essentially coplanar [r.m.s. deviation = 0.032 Å]. The largest deviation from the plane of the pyridine ring is 0.105 (6) Å for the terminal C atom of the eth-oxy group. In the crystal, mol-ecules are linked by pairs of N-H⋯O hydrogen bonds, forming inversion dimers. These dimers are further linked by C-H⋯π inter-actions and weak π-π inter-act...

In the title mol-ecule, C(14)H(18)OS(8), one O atom, two S atoms and six C atoms form an 11-membered ring with a chair-like conformation; the planes of the two five-membered rings connected by a carbon-carbon double bond form a dihedral angle of 29.97 (11)°. In the crystal, pairs of weak inter-molecular C-H⋯S hydrogen bonds link two mol-ecules into inversion dimers.

In the title compound, C(15)H(17)NO(2)S, the dihedral angle between the two aromatic rings is 53.9 (1)°. The crystal structure features inversion-related dimers linked by N-H⋯O hydrogen bonds.

In the title compound, C(15)H(12)ClN(3)O(2)S(2), the dihedral angle between the aromatic rings is 89.71 (10)°. In the crystal, inversion dimers linked by pairs of N-H⋯S hydrogen bonds occur.

In the title compound, C(15)H(11)NO(2)S, the dihedral angle between the aromatic rings is 80.35 (7)°. The heterocyclic six-membered ring is not planar: the puckering parameters of this ring are Q = 0.5308 (15) Å, θ = 63.11 (18) and ϕ = 23.5 (2)°. The mol-ecules are linked into inversion dimers with R(2) (2)(8) ring motifs by pairs of N-H⋯O hydrogen bonds. The dimers are inter-linked into polyme...