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The asymmetric unit of the title compound, C8H15N3S, contains two independent molecules. In both molecules, the seven-membered cycloheptane ring adopts a chair conformation. An intramolecular N—H...N hydrogen bond is observed in both molecules, forming S(5) graph-set motifs. In the crystal, the two independent molecules are connected through N—H...S hydrogen bonds, forming dimers which are in turn further connected by N—H...S hydrogen bonds into chains along [010].

In the title molecule, C15H11Cl2NOS, the dihedral angle between the phenyl and benzene rings is 72.24 (1)°. In the crystal, pairs of N—H...S hydrogen bonds form dimers with twofold rotational symmetry. The dimers are connected by weak C—H...O hydrogen bonds, forming a two-dimensional network parallel to (001). An intramolecular O—H...S hydrogen bond is also observed.

In the title molecule, C19H17F3N2O2, the fused cyclohexene and pyran rings adopt sofa and flattened boat conformations, respectively. The four essentially planar atoms of the pyran ring [maximum deviation = 0.008 (2) Å] form a dihedral angle of 88.13 (9)° with the benzene ring. The F atoms of the trifluoromethyl group were refined as disordered over three sets of sites in a 0.507 (7):0.330 (7):0.163 (3) ratio. In the crystal, molecules are connected into inversion dimers via pairs of N—H...N hydrogen bonds and these dimers are further linked by N—H...O hydrogen bonds into a two-dimensional network parallel to (100).

In the title moleclue, C6H7N3, the mean plane of the dimethylamino group [maximum deviation = 0.006 (2) Å] forms a dihedral angle of 7.95 (18)° with the mean plane of the propanedinitrile fragment [maximum deviation = 0.008 (2) Å]. In the crystal, weak C—H...N hydrogen bonds link the molecules into a three-dimensional network.

The asymmetric unit of the title compound, C25H31NO4, contains two independent molecules. In one molecule, the benzene ring and an attached methoxy group were refined as disordered over two sets of sites in a 0.65 (4): 0.35 (4) ratio. In both molecules, the central ring of the acridinedione system adopts a flattened boat conformation. The four essentially planar atoms of this ring [maximum deviations = 0.006 (5) Å in both molecules] forms dihedral angles of 86.8 (2) and 87.6 (2)°, respectively, with the major and minor components in the disordered benzene ring and 87.3 (2)° with the benzene ring in the fully ordered molecule. The two outer rings of the acridinedione system adopt sofa conformations in both molecules. In the crystal, N—H...O hydrogen bonds form two independent chains along [100]. C—H...O hydrogen bonds link the chains, forming a three-dimensional network.

In the title molecule, C17H13FN2O2, the 3,4-dihydropyrimidine ring adopts a flattened sofa conformation with the flap atom (which bears the fluorophenyl substituent) deviating from the plane defined by the remaining five ring atoms by 0.281 (2) Å. This plane forms dihedral angles of 85.98 (6) and 60.63 (6)° with the 4-fluorophenyl and benzoyl-phenyl rings, respectively. The dihedral angle between the 4-fluorophenyl group and the benzene ring is 71.78 (6)°. In the crystal, N—H...O hydrogen bonds link molecules into inversion dimers that are further connected by another N—H...O interaction into a two-dimensional supramolecular structure parallel to (101).

In the title molecule, C24H29NO4, the central ring of the acridinedione system adopts a flat boat conformation and the four essentially planar atoms of this ring [maximum deviation = 0.001 (2) Å] form a dihedral angle of 85.99 (12)° with the benzene ring. The two outer rings of the acridinedione system adopt sofa conformations. In the crystal, O—H...O and N—H...O hydrogen bonds link the molecules, forming a two-dimensional network parallel to (100).

In the title molecule, C23H26FNO2, the central ring of the acridinedione system adopts a slight boat conformation and the four essentially planar atoms of this ring [maximum deviation = 0.019 (1) Å] form a dihedral angle of 89.98 (6)° with the benzene ring. The two outer rings of the acridinedione system adopt sofa conformations. In the crystal, N—H...O hydrogen bonds link the molecules, forming chains along [001].

In the title molecule, C19H18F3N3O, the dihydropyridine and cyclohexene rings both adopt sofa conformations. The five essentially planar atoms of the dihydropyridine ring [maximum deviation = 0.039 (2) Å] form a dihedral angle of 88.19 (8)° with the benzene ring. The F atoms of the trifluoromethyl group were refined as disordered over two sets of sites in a 0.840 (3):0.160 (3) ratio. In the crystal, N—H...O and N—H...N hydrogen bonds link molecules into a two-dimensional network parallel to (100).

In the title compound, [Na(C11H11ClN3O3)(H2O)]n, there are two independent NaI ions, one of which lies on an inversion center and is coordinated in a slightly distorted octahedral environment. The other NaI ion lies on a twofold rotation axis and is cooordinated in a slightly distorted trigonal–bipyramidal coordination environment. In the organic ligand, the imidazolidine ring adopts a half-chair conformation. The NaI ions bridge organic ligands and water molecules, forming a two-dimensional structure parallel to (100). There are intermolecular O—H...O and weak C—H...O hydrogen bonds within the two-dimensional structure.

In the title compound, C13H16ClN5O4, the imidazole ring is in a slight envelope conformation. The dihedral angle between the pyridine ring and the four essentially planar atoms [maximum deviation 0.015 (2) Å] of the imidazole ring is 80.8 (1)°. In, the crystal, weak C—H...O and C—H...N hydrogen bonds are present. In addition, there are weak π–π stacking interactions between symmetry-related pyridine rings with a centroid–centroid distance of 3.807 (1) Å.

In the title compound, C12H14ClN3O3, the imidazole ring adopts a half-chair conformation. The dihedral angle between the pyridine and imidazole rings is 70.0 (1)°. In the crystal, the molecules are linked by C—H...O interactions, forming chains parallel to the c axis.

The title compound, C9H12ClN4+·Cl−, is a natural metabolic product of imidacloprid [systematic name: (E)-1-(6-chloro-3-pyridylmethyl)-N-nitroimidazolidin-2-ylideneamine] and was obtained by the reduction of the latter using Fe in HCl. The dihedral angle between the pyridine and imidazole rings is 62.09 (12)°. The crystal structure is stabilized by N—H...Cl and C—H...Cl interactions involving the chloride anion. The pyridine N and the chloride atoms are not involved in intermolecular interactions.