Two enantiomeric counterparts (l- and d-asparginium cations related by glide planes) are present in the structure of the title compound, C4H9N2O3
+·ClO4
−, with a 1:1 cation–anion ratio. The structure is built up from asparginium cations and perchlorate anions. In the crystal, molecules assemble in double layers parallel to (100) through N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds. In the asparginium layers, hydrogen bonds generate alternating R
2
2(8) and R
4
3(18) graph-set motifs. Further hydrogen bonds involving the anions and cations result in the formation of a three-dimensional network.
The title compound, 2C5H7N5
2+·2HSO4
−·SO4
2−, was synthesized from adenine and sulfuric acid. The asymmetric unit contains two diprotonated adeninium cations, two bisulfate anions and one sulfate anion. The crystal structure is stabilized by classical N—H⋯O and O—H⋯O hydrogen bonds, and weak C—H⋯O and C—H⋯N hydrogen bonds, generating a three-dimensional network.
Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.002 Å; R factor = 0.021; wR factor = 0.054; data-to-parameter ratio = 16.2.In the anion of the title compound, (C 7 H 11 N 2 )[CoCl 3 -(C 7 H 10 N 2 )], the Co II ion is coordinated by one N atom from a 4-(dimethylamino)pyridine (DMAP) ligand and three Cl atoms, forming a CoNCl 3 polyhedron with a distorted tetrahedral geometry. In the crystal, cations and anions are linked via weak N-HÁ Á ÁCl and C-HÁ Á ÁCl hydrogen bonds. Double layers of complex anions stack along the b-axis direction, which alternate with double layers of 4-(dimethylamino)-pyridinium cations.
Related literature
Data collectionBruker APEXII diffractometer 7932 measured reflections 3230 independent reflections 2982 reflections with I > 2(I) R int = 0.012
In the title salt, [Co(C7H9NO)2(H2O)2]Cl2, the CoII cation, located on an inversion center, is N,O-chelated by two hydroxyethylpyridine ligands and coordinated by two water molecules in a distorted O4N2 octahedral geometry. In the crystal, the Cl− anions link with the complex cations via O—H⋯Cl hydrogen bonds, forming a three-dimensional supramolecular architecture. π–π stacking is observed between the pyridine rings of adjacent molecules [centroid–centroid distance = 3.5810 (11) Å].
The title compound, (C24H20P)2[CoCl4], was prepared under hydrothermal conditions. In the crystal, the tetraphenylphosphonium cations are linked by pairs of weak C—H⋯π interactions into supramolecular dimers; the CoII cations lie on twofold rotation axes and the tetrahedral [CoCl4]2− anions are linked with the tetraphenylphosphonium cations via weak C—H⋯Cl hydrogen bonds.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.