The asymmetric unit of the title compound, (CH6N3)4[Cu(C6H5O7)2]·2H2O, contains one-half of a centrosymmetric CuII complex anion, two guanidinium cations and a water molecule. The CuII ion, lying on a crystallographic inversion center, is hexacoordinated with two citrate anions in a distorted octahedral geometry. An intramolecular O—H⋯O hydrogen bond generates an S(6) ring motif. In the crystal structure, molecules are linked into a three-dimensional framework by intermolecular N—H⋯O and O—H⋯O hydrogen bonds.
In the title molecular salt, C7H16N+·Cl−, the piperidinium ring adopts a chair conformation. In the crystal, the two components are connected by N—H⋯Cl and C—H⋯Cl hydrogen bonds, forming a supramolecular double-chain structure along the c axis.
In the title hydrated molecular salt, C7H11N2
+·Cl−·2H2O, the pyridine N atom of the 2-amino-4,6-dimethylpyridine molecule is protonated. The cation is essentially planar, with a maximum deviation of 0.006 (2) Å. In the crystal, the components are linked by N—H⋯O, N—H⋯Cl and O—H⋯Cl hydrogen bonds, thereby forming sheets lying parallel to (100). The crystal structure is further stabilized by aromatic π–π stacking interactions between the pyridinium rings [centroid–centroid distance = 3.4789 (9) Å].
In the title compound, C13H15F2NO, the piperidine ring adopts a chair conformation. The dihedral angle between the least-squares plane of the piperidine ring and the benzene ring is 48.75 (7)°. In the crystal structure, the molecules are connected via C—H⋯O hydrogen bonds, forming a zigzag chain along the b axis.
In the crystal structure of the title compound, C10H10N+·Cl−, the two components are connected via N—H⋯Cl hydrogen bonds, forming a layer parallel to the bc plane.
The title molecule, C14H14Cl2N2O4S2, lies on an inversion center. The molecule is twisted in the region of the sulfonamide group with a C—S—N—C torsion angle of −67.49 (16)°. In the crystal, molecules are connected via intermolecular N—H⋯O and weak C—H⋯O hydrogen bonds, forming layers parallel to (100).
In the title compound, C14H16N2O4S2, the dihedral angle between the terminal phenyl rings is 77.07 (13)°. The geometries around the S atoms are distorted tetrahedral, with O—S—O angles of 120.66 (12) and 119.44 (11)°. In the crystal, molecules are stacked in columns along the a axis via intermolecular N—H⋯O and C—H⋯O hydrogen bonds.
The complete molecule of the title compound, C27H18F4N2O2, is generated by crystallographic twofold symmetry, with one C atom lying on the rotation axis. The dihedral angle between fluoro-substituted phenyl ring and the adjacent benzene ring is 10.37 (5)°. In the crystal, molecules are connected by N—H⋯O and C—H⋯F hydrogen bonds, resulting in supramolecular chains propagating along the c direction.
The asymmetric unit of the title compound, 2C5H8N3
−·H2O, contains two crystallographically independent 2,6-diaminopyridinium cations, a pair of hydrogen oxalate anions and a water molecule. Both 2,6-diaminopyridinium cations are planar, with maximum deviations of 0.011 (2) and 0.015 (1) Å, and are protonated at the pyridine N atoms. The hydrogen oxalate anions adopt twisted conformations and the dihedral angles between the planes of their carboxyl groups are 31.01 (11) and 63.48 (11)°. In the crystal, the cations, anions and water molecules are linked via O—H⋯O and N—H⋯O hydrogen bonds, forming a three-dimensional network.
In the crystal of the title molecular salt, C5H8N3
−, the diaminopyridine cation and the phthalate anion are linked by a pair of N—H⋯O hydrogen bonds. Within the phthalate anion, an almost symmetrical O—H⋯O hydrogen bond is observed. The ion pairs are linked by further N—H⋯O hydrogen bonds, generating a two-dimensional network lying parallel to (10).
In the cation of the title compound, C12H10F2N3O+·Cl−, the dihedral angle between the pyridine and benzene rings is 16.1 (1)°. In the crystal structure, molecules linked into two-dimensional sheets parallel to the bc plane by intermolecular N—H⋯Cl, C—H⋯Cl and C—H⋯F hydrogen bonds.
In the title compound, C7H4F2O2, the dihedral angle between the benzene ring and the carboxylate group is 33.70 (14)°. In the crystal structure, inversion dimers linked by pairs of O—H⋯O hydrogren bonds occur, generating R
2(8) loops. The dimers are linked into sheets lying parallel to (102) by C—H⋯F hydrogen bonds.
In the title compound, (C5H8N3)2[Co(H2O)6](SO4)2·2H2O, the complete complex cation is generated by crystallographic inversion symmetry, such that the CoII cation is octahedrally coordinated by six water molecules. The organic cation is essentially planar, with a maximum deviation of 0.013 (1) Å. In the crystal structure, the ions and molecules are linked into a pseudo-layered three-dimensional supramolecular network via O—H⋯O and N—H⋯O hydrogen bonds. Weak intermolecular π–π interactions further stabilize the crystal structure [centroid–centroid distance = 3.5231 (4) Å].
In the organic cation of the title compound, C13H20N3
+·Cl−·H2O, the two pyrrolidine rings adopt twisted conformations. The pyridine ring makes dihedral angles of 14.57 (6) and 23.96 (6)° with the mean planes of the pyrrolidine rings. In the crystal structure, pairs of bifurcated intermolecular O—H⋯Cl hydrogen bonds link the water molecules and chloride anions into an R
4(8) ring motif. Intermolecular N—H⋯Cl, C—H⋯Cl and C—H⋯O hydrogen bonds further interconnect these rings with the organic cations into a two-dimensional network parallel to the bc plane.
In the anion of the title molecular salt, C6H16N+·C6H4O5S−, the nitro group is twisted slightly from the benzene ring, making a dihedral angle of 3.16 (10)°. In the crystal structure, the cations and anions are linked into a two-dimensional network parallel to the ab plane by C—H⋯O and N—H⋯O hydrogen bonds.
In the title compound, [Na(C6H3Cl2O3S)(H2O)]n, the NaI ion is pentacoordinated by three dichlorobenzenesulfonate anions and two water molecules, forming a distorted trigonal-bipyramidal geometry. The NaI ions are bridged by the sulfonate groups and the water molecules, leading to a polymeric layer structure parallel to the bc plane in which O—H⋯O hydrogen bonds are observed.
A monoclinic polymorph of the title compound, [Na(C4H5O6)(H2O)]n, is reported and complements an orthorhombic form [Kubozono, Hirano, Nagasawa, Maeda & Kashino (1993 ▶). Bull. Chem. Soc. Jpn, 66, 2166–2173]. The asymmetric unit contains a hydrogen tartrate anion, an Na+ cation and a water molecule. The Na+ ion is surrounded by seven O atoms derived from one independent and three symmetry-related hydrogen tartrate anions, and a water molecule, forming a distorted pentagonal–bipyramidal geometry. Independent units are linked via a pair of intermolecular bifurcated O—H⋯O acceptor bonds, generating an R
1(6) ring motif to form polymeric two-dimensional arrays parallel to the (100) plane. In the crystal packing, the arrays are linked by adjacent ring motifs, together with additional intermolecular O—H⋯O interactions, into a three-dimensional network.
The asymmetric unit of the title compound, (CH6N3)2[Zn2(C6H5O7)2(H2O)2]·2H2O, contains one-half of a centrosymmetric dizinc(II) complex anion, one guanidinium cation and one water molecule. Each ZnII ion is hexacoordinated by two citrate anions, one in a bidentate fashion and the second monodentate, and two water molecules in a distorted octahedral geometry. Intramolecular O—H⋯O hydrogen bonds add further stability to the molecular structure. In the crystal structure, molecules are linked into a three-dimensional framework by intermolecular N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds.
In the title compound, 2C5H8N3
2−·H2O, the two cations are essentially planar [maximum deviations = 0.023 (1) and 0.026 (1) Å]. In one of the cations, the protonated N atom and one of the amino group H atoms are hydrogen bonded to one of the carboxyl groups of the dianion through a pair of N—H⋯O hydrogen bonds, forming an R
2(8) ring motif. In the crystal structure, the tartrate anions and water molecules are linked into chains along the c axis by intermolecular O—H⋯O and C—H⋯O hydrogen bonds. The cations further link the anions and water molecules into a three-dimensional extended structure by a network of N—H⋯O hydrogen bonds. The crystal structure is also stabilized by weak intermolecular π–π interactions [centroid–centroid distance = 3.6950 (6) Å].
In the title compound, 4C5H8N3
2−·C5H7N3, the asymmetric unit consists of two protonated diaminopyridine cations, one phthalate anion and one half of a diaminopyridine molecule, which has twofold rotation symmetry and is disordered over two positions with a site-occupancy ratio of 0.534 (3):0.466 (3). In the disordered structure, both pyridine rings are essentially planar, with maximum deviations of 0.011 (2) and 0.006 (2) Å, and these two rings are inclined to one another at a dihedral angle of 79.86 (10)°. In the crystal structure, intermolecular N—H⋯O and C—H⋯O hydrogen bonds link the ions and molecules into a three-dimensional network. The structure is further stabilized by C—H⋯π interactions.
In the title hydrated salt, CH6N3
−·H2O, the deprotonated carboxyl group is disordered over two positions with a site-occupancy ratio of 0.945 (3):0.055 (3). The bond lengths in the guanidinium cation are intermediate between normal C—N and C=N bond lengths, indicating significant delocalization in this species. In the crystal structure, anions and water molecules are linked into sheets parallel to the ab plane by intermolecular O—H⋯O hydrogen bonds. The linking of the anions and water molecules with the cations by intermolecular N—H⋯O hydrogen bonds creates a three-dimensional network.