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organic compounds
The asymmetric unit of the title compound, C10H10N22+·2C6H2N3O7−, comprises half of one 4,4′-bipyridinium cation and a picrate anion. The 4,4′-bipyridinium cation lies on an inversion center. The packing is governed by N—H
O and C—HO hydrogen-bond interactions.
O and C—HO hydrogen-bond interactions. metal-organic compounds
The title compound, [Cd(H2O)6]2(C24H2O16S8)·H2O, the bis[hexaaquacadmium(II)] salt of the p-sulfonatothiacalix[4]arene tetraanion, crystallizes as a hydrate; two symmetry-independent cations interact with the tetraanion via their coordinated water molecules. The Cd atoms and water O atom lie on special positions of site symmetry m and the complete calixarene anion is generated by mirror symmetry. The water molecule is weakly associated with the calixarene cavity by way of long O—HO hydrogen bonds.
O hydrogen bonds.metal-organic compounds
The title crystal structure, [Co(NO3)(C10H15N3OS)2]NO3, consists of CoII complex cations and NO3− anions, located on different twofold axes and linked to each other via O—HO hydrogen bonding. The CoII complex assumes a distorted octahedral coordination geometry, formed by a chelating nitrate and two ImTh molecules (ImTh is 1-hydroxy-4,4,5,5-tetramethyl-2-(1,3-thiazol-2-yl)-4,5-dihydro-1H-imidazole). Within the ImTh molecule, the N—O bond distance of 1.386 (2) Å is much longer than the N—O bonds found in related complexes with the nitroxide radical.
O hydrogen bonding. The CoII complex assumes a distorted octahedral coordination geometry, formed by a chelating nitrate and two ImTh molecules (ImTh is 1-hydroxy-4,4,5,5-tetramethyl-2-(1,3-thiazol-2-yl)-4,5-dihydro-1H-imidazole). Within the ImTh molecule, the N—O bond distance of 1.386 (2) Å is much longer than the N—O bonds found in related complexes with the nitroxide radical.organic compounds
Molecules of the title compound, C9H9BrO2, form a chain, via π–π stacking interactions, which runs along the a axis.
organic compounds
Molecules of the title compound, C17H16O4, form a chain along the c axis via π–π stacking interactions involving neighboring aromatic rings. The chains are linked through intermolecular C—HO hydrogen bonds, resulting in a zigzag packing arrangement.
O hydrogen bonds, resulting in a zigzag packing arrangement.organic compounds
In the crystal structure of the title compound, C10H17N3O2S, the packing of the molecules is mainly a result of two types of O—HN hydrogen-bonding interactions, forming a two-dimensional network.
N hydrogen-bonding interactions, forming a two-dimensional network.
