journal menu
metal-organic compounds
Open 
access
access
The title compound, [Cu3(C7H3NO4)4(C2H8N2)2]·C2H8N2·4H2O, was obtained by the reaction of copper(II) acetate dihydrate with pyridine-2,6-dicarboxylic acid (H2dipic) and ethylenediamine (en) in an aqueous solution. All of the CuII atoms in the trinuclear centrosymmetric title complex are six-coordinated in a distorted octahedral geometry with N2O4 and N4O2 environments for the outer and central CuII atoms, respectively. Various interactions, including numerous O—H
O and C—HO hydrogen bonds and C—Oπ stacking of the pyridine and carboxylate groups [Ocentroid distances = 3.669 (2) and 3.668 (2) Å] are observed in the crystal structure.
O and C—HO hydrogen bonds and C—Oπ stacking of the pyridine and carboxylate groups [Ocentroid distances = 3.669 (2) and 3.668 (2) Å] are observed in the crystal structure. metal-organic compoundsOpen access
access
The crystal structure of the title compound, (C6H16N)2[CoCl4], is comprised of a tetrahedral [CoCl4]2− anion and two independent triethylammonium cations. The latter are featureless while the [CoCl4]2− anion exhibits typical Co—Cl bond lengths [2.2428 (15)–2.2847 (16) Å] and a Cl—Co—Cl angular range of 107.58 (6)–112.73 (7)°. In the crystal, N—HCl hydrogen bonds between the two crystallographically independent cations and the [CoCl4]2− anion generate discrete ion triplets. The two Co—Cl bonds involved in these interactions are slightly longer than the remaining two.
Cl hydrogen bonds between the two crystallographically independent cations and the [CoCl4]2− anion generate discrete ion triplets. The two Co—Cl bonds involved in these interactions are slightly longer than the remaining two.metal-organic compoundsOpen access
access
The asymmetric unit of the title complex, (C6H8N)2[Cu(C7H3NO4)2]·6H2O, contains half a copper(II)–dipicolinate complex located on a twofold rotation axis, one protonated aniline molecule and three solvent water molecules. The CuII atom is coordinated by four O atoms and two N atoms from two dipicolinate ligands in a distorted octahedral environment. In the crystal, the components are linked into a three-dimensional framework by intermolecular O—HO and N—HO interactions.
O and N—HO interactions.organic compoundsOpen access
access
In the title compound, C5H5N3O, the isoxazole ring is essentially planar, with a maximum deviation of 0.007 (1) Å from the least-squares plane. The N atom of the amine group exhibits sp2 character (sum of bond angles around this atom = 358°). In the crystal, molecules are aggregated by two kinds of N—HN hydrogen bonds into fused R22(12) and R66(26) rings, forming a slightly puckered two-dimensional array lying parallel to (101).
N hydrogen bonds into fused R22(12) and R66(26) rings, forming a slightly puckered two-dimensional array lying parallel to (101).organic compoundsOpen access
access
The asymmetric unit of the title salt, C4H12N+·C8H5O4−, contains one half of a tetramethylammonium cation and one half of a hydrogen terephthalate monoanion. The N atom of the ammonium cation lies on a twofold rotation axis and the centre of mass of the terephthalate anion is on a centre of inversion. In the crystal, the centrosymmetric terephthalate ions are linked by a very short symmetric O—HO hydrogen bond [OO = 2.4610 (19) Å] into a one-dimensional polymeric chain along [1-12]. The tetramethylammonium cations and terephthalate anions are then connected through a pair of bifurcated acceptor C—HO hydrogen bonds, generating a three-dimensional supramolecular network. The carboxylate groups at both ends of the terephthalate anion are charge-shared with an equal probability of 0.5.
O hydrogen bond [OO = 2.4610 (19) Å] into a one-dimensional polymeric chain along [1-12]. The tetramethylammonium cations and terephthalate anions are then connected through a pair of bifurcated acceptor C—HO hydrogen bonds, generating a three-dimensional supramolecular network. The carboxylate groups at both ends of the terephthalate anion are charge-shared with an equal probability of 0.5.
