158 research outputs found
Defying Contextual Embeddedness: Evidence from Displaced Women Entrepreneurs in Jordan
Publisher’s embargo period: Embargo set on 04.03.2019 by SR (TIS)
Diguanidinium bis(μ-2-hydroxypropane-1,2,3-tricarboxylato)bis[diaquazincate(II)] dihydrate
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
2,6-Diaminopyridinium 2-carboxybenzoate
In the crystal of the title molecular salt, C5H8N3
+·C8H5O4
−, 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)
Bis(2,6-diaminopyridinium) tartrate monohydrate
In the title compound, 2C5H8N3
+·C4H4O6
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
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]
Tetraguanidinium bis[citrato(3−)]cuprate(II) dihydrate
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
Naphthalen-1-aminium chloride
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
Ethyl 4-(phenylsulfonyl)piperazine-1-carboxylate
In the title compound, C13H18N2O4S, the piperazine ring adopts a chair conformation. The dihedral angle between the least-squares planes through the piperazine and benzene rings is 73.23 (10)°. In the crystal, there are no classical hydrogen bonds but stabilization is provided by weak C—H⋯π interactions
(2,6-Difluorophenyl)(4-methylpiperidin-1-yl)methanone
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
Monoclinic polymorph of poly[aqua(μ4-hydrogen tartrato)sodium]
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
2
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
Poly[μ2-aqua-(μ3-2,5-dichlorobenzenesulfonato)sodium]
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
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