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In the title compound, [Ag2(C5H12O2)2(C19H17OP)2], the coordination number of silver is three, bonded to one P atom and two O atoms. The carboxyl­ate unit acts as a monodentate ligand through one O atom to bridge two Ag atoms, giving a centrosymmetric dimeric complex. The two Ag atoms and two O atoms in the four-membered ring are exactly coplanar.

The title compound, C16H16N2O2, was prepared by the reaction of p-nitroacetophenone and 3,5-dimethylaniline. The crystal structure has no classical hydrogen bonds.

In the title structure, C21H16BrClN2, the pyrazoline ring is approximately coplanar with the N-substituted phenyl ring. The dihedral angles formed by the pyrazoline ring with the 4-chlorophenyl and 4-bromophenyl rings are 78.82 and 10.9°, respectively.

In the title structure, C21H16Cl2N2, the pyrazoline ring makes dihedral angles of 6.76 (9), 7.52 (10) and 81.88 (10)°, respectively, with the 4-chloro­phenyl ring, the phenyl ring and the 2-chlorophenyl ring. The 5-phenyl ring is almost perpendicular to the pyrazoline ring.

In the title molecule, C12H16N2O, the pyrrolidine ring has a half-chair conformation. In the crystal, molecules are linked into C(4) chains along [001] by N—H...O hydrogen bonds.

In the title compound, C13H17ClN2O, the piperidine ring adopts a chair conformation and the N atom in that ring is close to pyramidal (bond angle sum = 357.5°). In the crystal, molecules are linked into C(4) chains propagating in [010] by N—H...O hydrogen bonds.

The title compound, C10H13N3S, prepared by the reaction of 4-methylbenzaldehyde and 4-methylthiosemicarbazide, is approximately planar (r.m.s. deviation for the non-H atoms = 0.032 Å). Its conformation is stabilized by an intramolecular N—H...N hydrogen bond, generating an S(5) ring. In the crystal, inversion dimers linked by pairs of N—H...S hydrogen bonds occur. Further weak N—H...S links connect the dimers into (100) sheets.

The title compound, C10H13N3OS, was prepared by the reaction of 4-methoxybenzaldehyde and 4-methylthiosemicarbazide. The dihedral angle between the benzene ring and the thiourea unit is 8.64 (7)° and an intramolecular N—H...N hydrogen bond generates an S(5) ring. In the crystal, inversion dimers linked by pairs of N—H...S hydrogen bonds generate R22(8) loops. The dimers are linked into (001) sheets by further N—H...S links.

The title compound, C12H17N3S, was prepared by the reaction of 4-ethylthiosemicarbazide and 3,4-dimethylbenzaldehyde. The dihedral angle between the thiourea unit and the benzene ring is 7.09 (8)°. In the crystal, inversion dimers linked by pairs of N—H...S hydrogen bonds occur.

The title compound, C10H11Cl2N3S, was prepared by the reaction of 4-ethylthiosemicarbazide and 2,4-dichlorobenzaldehyde. It is approximately planar, the dihedral angle between the benzene ring and the thiourea unit being 8.43 (18)°. In the crystal, inversion dimers linked by pairs of N—H...S hydrogen bonds generate R22(8) loops.

The title compound, C(14)H(14)N(2)O(2), was prepared by the reaction of 3,4-dimethyl-benzaldehyde and furan-2-carbohydrazide. The dihedral angle between the aromatic rings is 35.48 (14)°. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds, generating C(4) chains propagating in [010].

In the title compound, C11H15N3OS, the dihedral angle between the aromatic ring and the thiourea unit is 4.28 (7)° and an intramolecular N—H...N hydrogen bond generates an S(5) ring. In the crystal, molecules are linked into (001) sheets by N—H...S hydrogen bonds.

In the title compound, C(12)H(10)N(2)O(2)S, the dihedral angle between the benzene and thio-phene rings is 23.34 (16)°. In the crystal structure, mol-ecules are linked by N-H⋯O and O-H⋯O hydrogen bonds, forming (100) sheets.

In the title compound, C(13)H(9)N(3)O(2)·H(2)O, the dihedral angle between the aromatic rings is 10.7 (4)° and an intra-molecular N-H⋯O hydrogen bond occurs. In the crystal, the components are linked by N-H⋯O, O-H⋯N and O-H⋯O hydrogen bonds.

In the title salt, C5H14NO+·C2F3O2−, the cation and anion are linked by N—H...O and O—H...N hydrogen bonds, generating a three-dimensional network.

The title compound, C(13)H(9)N(3)OS, was prepared by the reaction of thio-phene-2-carbohydrazide and 4-formyl-benzonitrile. The dihedral angle between the benzene and thio-phene rings is 11.9 (1)°. In the crystal structure, mol-ecules are linked into centrosymmetric dimers by pairs of N-H⋯O hydrogen bonds.

In the title compound, C(16)H(10)O(6), the complete mol-ecule is generated by a crystallographic centre of symmetry. In the crystal, O-H⋯O hydrogen bonds link the mol-ecules into (100) sheets and C-H⋯O links also occur.

In the title compound, C12H16N2O4, an intramolecular O—H...O hydrogen bond occurs. In the crystal, molecules are linked by N—H...O hydrogen bonds, forming chains propagating in the [010] direction.

In the crystal of the title compound, C8H9N3O2, molecules are linked by N—H...N hydrogen bonds, forming S(7) chains propagating in [010].

In the title compound, [Cu(C2Cl3O2)2(C6H12N4)2], the CuII ion (site symmetry 2) is coordinated by two trichloroacetate anions and two hexamethylenetetramine molecules, resulting in a distorted CuN2O2 geometry that is intermediate between tetrahedral and square planar. The Cl atoms are disordered over two sets of sites, with relative occupancies of 0.749 (7) and 0.251 (7). In the crystal, the packing is consolidated by intermolecular C—H...O interactions.

The title compound, C11H14N2O3, was prepared by the reaction of ethyl carbazate and 1-(2-hydroxyphenyl)ethanone. In the crystal structure, molecules are linked by intermolecular N—H...O hydrogen bonds, forming centrosymmetric dimers. An intramolecular O—H...N interaction also occurs.

The title compound, [Cu(C2HCl2O2)(C7H6N2)3(H2O)]C2HCl2O2·2H2O, was prepared by reaction of copper(II) 2,2-dichloro­acetic acid and benzimidazole in ethanol solution. The compound shows a regular trigonal–bipyramidal stereochemistry. The CuII centre possesses a five-coordinated environment, coordinated by three N atoms from the three benzimidazole ligands and two O atoms, one from the dichloro­acetate ligand and the other from the coordinated water mol­ecule. The mol­ecular structure and packing are stabilized by O—H⋯O and N—H⋯O hydrogen bonds. The Cl atoms are disordered over two sites, with relative occupancies 0.67 (3) and 0.33 (3).

The title compound, C(30)H(26)O(2), was prepared by the reaction of a Wittig reagent and 2-methoxy-benzaldehyde. The mol-ecule lies about an inversion centre located at the midpoint of the C-C bond between the inner benzene rings. The crystal structure is stabilized by C-H⋯π inter-actions.

The title compound, C(10)H(11)N(3)O(3), was prepared by the reaction of acetohydrazide and 1-(4-nitro-phen-yl)ethanone. The asymmetric unit contains two crystallographically independent mol-ecules. Inversion-related mol-ecules form dimers, in which two N-H⋯O hydrogen bonds generate an inter-molecular R(2) (2)(8) ring.

The title compound, C(11)H(14)N(2)O(2), was prepared by the reaction of acetohydrazide and 1-(4-methoxy-phen-yl)ethanone. In the mol-ecule, all bond lengths and angles are within normal ranges. In the crystal structure, adjacent mol-ecules are linked into a centrosymmetric dimer by inter-molecular N-H⋯O hydrogen bonding.

The title compound, C12H16N2S, was prepared by the reaction of with phenyl isothiocyanate and piperidine. In the crystal structure, the molecule exhibits intermolecular N—H...S hydrogen bonds and weak intramolecular C—H...S and C—H...N hydrogen-bonding interactions.

The title compound, C21H42N6, was prepared by the reaction of 2,4,6-trichloro-1,3,5-triazine with dipropylamine. The structure of the molecule is tripodal.

In the mol­ecule of the title compound, C13H13NO3S, the dihedral angle between the planar benzene and pyrrole rings is 101.7 (2)°. In the crystal structure, inter­molecular C—H⋯O hydrogen bonds link the mol­ecules into chains.