The asymmetric unit of the title compound, C14H17NO4·1.25H2O, consists of four substituted pyrrolidone molecules (two pairs of enantiomers) and five water molecules. The five-membered rings each have an envelope conformation, with the C atom bonded to the ester group as the flap. The mean planes of the five-membered rings of the four pyrrolidone molecules make dihedral angles of 60.87 (5), 64.45 (5), 62.03 (5) and 65.79 (5)° with respect to the phenyl rings. In the crystal, the pyrrolidone and water molecules are connected through O—H⋯O hydrogen bonds, forming a layer parallel to the ab plane. The two-dimensional network is further stabilized by intermolecular C—H⋯O hydrogen bonds.
The title molecule, C10H9NO, is almost planar with an r.m.s. deviation for all non-H atoms of 0.0115 Å. In the crystal, molecules are connected through N—H⋯O hydrogen bonds into chains running along . The chains are further connected via C—H⋯π interactions, forming layers in the bc plane.
In the title compound, C13H12O3, the pyran ring adopts a half-chair conformation with a C atom deviating from the least-squares plane of the remaining ring atoms by 0.606 (2) Å. This plane and that of the benzene ring make a dihedral angle of 44.18 (6)°. In the crystal, molecules are linked through O—H⋯O hydrogen bonds into infinite chains along the b axis, and these chains are cross-linked by C—H⋯O hydrogen bonded into sheets lying parallel to the bc plane. The layers are further connected via C—H⋯π interactions to form a three-dimensional supramolecular structure.
In the Schiff base molecule of the title compound, C22H20N4O2·C3H7NO·2H2O, the cyclohexane ring adopts a chair conformation with the two imine groups linked at the equatorial positions. The two indolin-2-one ring systems make a dihedral angle of 65.63 (5)°. In the crystal, the Schiff base molecules are connected through bifurcated N—H⋯(O,N) hydrogen bonds, forming inversion dimers. The water molecules link the dimers and the dimethylformamide molecules via O—H⋯O, O—H⋯N and N—H⋯O hydrogen bonds. Together with C—H⋯π and π–π [centroid–centroid distance = 3.3889 (10) Å] interactions a three-dimensional supramolecular structure is formed.
The asymmetric unit of the title compound, C20H28N2O6S2, contains one half-molecule, related to the other half by a twofold rotation axis. The two aromatic rings of the molecule make a dihedral angle of 50.91 (7)°. The O—CH2—CH2—O and N—CH2—CH2—O fragments both adopt gauche conformations, with torsion angles of 76.0 (4) and 70.4 (3)°, respectively. In the crystal, adjacent molecules are linked through N—H⋯O hydrogen bonds into chains along the a-axis direction. The chains are further connected via C—H⋯O interactions into a two-dimensional supramolecular network in the ac plane.
In the thiocarbonohydrazide molecule of the title compound, C17H12N6O2S·C4H8O, the terminal indolin-2-one ring systems make a dihedral angle of 20.13 (6)° with each other. Two intramolecular N—H⋯O hydrogen bonds are present, each of which generates an S(6) ring. In the crystal, N—H⋯O hydrogen bonds lead to a molecular chain running along the b axis. The tetrahydrofuran solvent molecule is disordered over two orientations in a 0.561 (11):0.439 (11) ratio.
In the title compound, C13H16N2O2, the planes of the benzimidazole ring system and the acetate O—C=O fragment make a dihedral angle of 84.5 (3)°. In the crystal, molecules are connected through C—H⋯N hydrogen bonds to form infinite chains in the [-110] direction.
In the title compound, C9H14N2O2, the imidazole ring and the acetate O—C=O plane make a dihedral angle of 80.54 (12)°. In the crystal, molecules are connected via pairs of C—H⋯O hydrogen bonds, forming centrosymmetric dimers.
The title compound, C16H14O5, is a triclinic polymorph of a previously reported monoclinic structure [Hosseinzadeh et al. (2011 ▶). Acta Cryst. E67, o1544]. The molecule is roughly planar, the r.m.s. deviation from the least-squares plane of all non-H atoms being 0.092 Å. In the crystal, adjacent molecules are linked through C—H⋯O hydrogen bonds into an infinite two-dimensional network parallel to (011). The layers are further connected via C—H⋯π interactions, forming a three-dimensional structure. Intramolecular O—H⋯O and C—H⋯O hydrogen bonds are also observed.
In the crystal structure of the title compound, C20H38N2
2+·2Br−, the centroid of the aromatic ring is located on an inversion center, so that the asymmetric unit consists of one-half molecule of the dication and one bromide anion. C—H⋯Br interactions connect the two components into a three-dimensional network. An intramolecular C—H⋯π interaction is also observed.
The centroid of the central aromatic ring of the title molecule, C24H22O4, is located on an inversion center. The dihedral angle between the central and terminal benzene rings is 75.00 (7)°. In the crystal, molecules are linked through C—H⋯O hydrogen bonds into chains along . The chains are connected into layers via C—H⋯π interactions.
In the title compound, C6H6N2O·C8H8O3, an equimolar co-crystal of nicotinamide and vanillin, the aromatic ring and the amide fragment of the nicotinamide molecule make a dihedral angle of 32.6 (2)°. The vanillin molecule is almost planar, with an r.m.s. deviation for all non-H atoms of 0.0094 Å. The vaniline and nicotinamide aromatic rings are nearly coplanar, the dihedral angle between them being 3.20 (9)°. In the crystal, the two components are linked through N—H⋯O and O—H⋯N hydrogen bonds into chains along the a axis. The chains are connected via C—H⋯O interactions, forming a three-dimensional polymeric structure.
In the title compound, C24H22O4, the centroid of the central benzene ring lies on a special position of 2/m site symmetry, while the terminal aromatic rings are located on a mirror plane. The central and terminal benzene rings are perpendicular to each other. In the crystal, the molecules are connected via C—H⋯O hydrogen bonds into a three-dimensional polymeric structure. The network is further consolidated by a C—H⋯π interaction.
The structure of the title salt, C13H20N3O+·0.94ClO4
−·0.06Cl−, contains a zwitterionic Schiff base with a net positive charge and a perchlorate anion having substitutional disorder with Cl. In the cation, the azomethine N atom is protonated and donates hydrogen bonds to the phenolate O atom and to the tertiary N atom of the piperazine ring. In the crystal, two Schiff base molecules are linked about a center of inversion by a pair of N—H⋯O hydrogen bonds. The resulting dimers are N—H⋯O and C—H⋯O hydrogen bonded to the perchlorate anions, forming a three-dimensional structure. The network is further consolidated by C—H⋯π interactions.
The asymmetric unit of the title compound, C24H22O4, contains one half-molecule, the other half being generated by a crystallographic center of inversion. The central benzene ring makes a dihedral angle of 72.49 (5)° with the terminal benzene ring. In the crystal, adjacent molecules are linked through C—H⋯O interactions, forming a sheet structure parallel to the bc plane. The sheets are stacked along the a axis via π–π interactions formed between the terminal benzene rings [centroid–centroid separation = 3.7276 (6) Å].
The title compound, C34H52N2O2, is centrosymmetric, the mid-point of the central C—C bond being located on an inversion centre. Intramolecular O—H⋯N and weak C—H⋯O hydrogen bonds are observed, but no significant intermolecular interactions occur in the crystal structure.
In the title compound, C12H12ClNO2S, the S atom is displaced by 0.708 (2) Å out of the plane through the remaining atoms of the thiazine ring (r.m.s. deviation = 0.0823 Å). This plane makes a dihedral angle of 89.33 (7)° with the phenyl ring. In the crystal, adjacent molecules are connected through C—H⋯O hydrogen bonds into layers parallel to the bc plane.
In the title compound, C16H11ClN2O2, the pyrazole ring makes dihedral angles of 11.88 (13) and 22.33 (13)° with the 3-chloro-2-hydroxybenzene group and phenyl rings, respectively. The phenolic hydroxy group forms an intramolecular O—H⋯N hydrogen bond with the imine N atom of the pyrazole unit. The formyl group is virtually coplanar with the pyrazole ring [dihedral angle = 4.5 (19)°] and acts as an acceptor in an intramolecular C—H⋯O hydrogen bond closing seven-membered ring. In the crystal, adjacent molecules are linked through C—H⋯O hydrogen bonds into infinite chains along the b axis.
In the title compound, C6H17N3
−, the piperazine ring adopts a chair conformation with the ethylammonium fragment occupying an equatorial position. In the crystal, the dications and perchlorate anions are linked through N—H⋯O hydrogen bonding and weak C—H⋯O hydrogen bonding into a three-dimensional supramolecular network.
The crystal studied of the title compound, C7H9N2O4
−·C7H8N2O4·H2O, was found to be a racemic twin with a 0.72 (18):0.28 (18) domain ratio. The hydrazidium group is close to planar, with an r.m.s deviation of 0.105 Å; the hydrazide group deviates more from planarity, with an r.m.s deviation of 0.174 Å. In the crystal, the hydrazidium cation, hydrazide molecule, perchlorate anions and water molecules are linked through O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds into a three-dimensional supramolecular network. In addition, the benzene rings of the hydrazidium and hydrazide units are connected via π–π interactions into infinite chains along the c axis; the centroid–centroid distances are 3.486 (3) and 3.559 (3) Å.
In the trinuclear title compound, [Zn3Cl6(C13H20N4)2]·2H2O, each terminal ZnII atom is coordinated by an N3 donor set from the Schiff base ligands and two Cl atoms in a distorted square-pyramidal geometry. The central ZnII atom is tetrahedrally coordinated by two piperazine N atoms from two Schiff base ligands and two Cl atoms. The piperazine rings adopt chair conformations. In the crystal structure, adjacent complex molecules are linked into a three-dimensional network via N—H⋯O, C—H⋯Cl and C—H⋯O hydrogen bonds. The structure includes two water molecules, one of which is disordered over two positions with occupancies of 0.753 (15) and 0.247 (15).
In the title compound, [Mn(C14H19N2O2)2Cl(H2O)]·H2O, the MnIII atom is N,O-chelated by two monoanionic Schiff bases, forming two six-membered chelate rings. One Cl atom and one water molecule in trans positions complete a distorted octahedral geometry around the metal atom. In the crystal, the complex molecules and the uncoordinated water molecules are connected via O—H⋯N, O—H⋯O and O—H⋯Cl hydrogen bonds into layers parallel to the ac plane and these are consolidated by C—H⋯π interactions. The layers are further linked into a three-dimensional network through C—H⋯O interactions.
The asymmetric unit of the title compound, 2K+·2C6H7N2O2S−·3H2O, consists of two potassium cations located on mirror planes, one sulfanilamidate anion in a general position and one and a half molecules of water, one of which is also located on a mirror plane. One potassium cation is seven-coordinated by six sulfonyl O atoms and one water molecule, whereas the other is surrounded by six water O atoms and two sulfonyl O atoms. In the crystal structure, the components are connected into polymeric sheets in the bc plane. The two-dimensional structure is consolidated by N—H⋯O, O—H⋯O, O—H⋯N and C—H⋯π interactions. The layers are further linked into a three-dimensional network via N—H⋯O, N—H⋯N and O—H⋯N hydrogen bonds.
The asymmetric unit of the title compound, [ZnCl2(C11H17N3)], contains two independent pentacoordinate ZnII complex molecules. In each molecule, the metal atom is coordinated by an N,N′,N′′-tridenate Schiff base and two Cl atoms in a distorted square-pyramidal geometry. The two molecules differ little in their geometry, but more in their intermolecular interactions. In the crystal, adjacent molecules are connected via C—H⋯Cl interactions into a three-dimensional supramolecular structure. The network is supplemented by π–π interactions formed between the aromatic rings of pairs of the symmetry-related molecules [centroid–centroid distances = 3.6255 (10) and 3.7073 (10) Å]. The crystal lattice contains void spaces with a size of 52 Å3.
In the title compound, [CdCl2(C14H21N3O2)], the Schiff base ligand chelates the CdII ion in an N,N,O-tridentate fashion. Two Cl atoms complete a distorted square-pyramidal coordination environment around the metal atom. In the crystal, adjacent molecules are linked through C—H⋯π interactions into infinite chains along the a axis. The molecules are further connected into a three-dimensional network via N—H⋯O, N—H⋯Cl and C—H⋯Cl interactions. The ethylene group is disordered over two sets of sites in a 0.520 (10):0.480 (10) ratio.