metal-organic compounds
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In the cation of the title salt, [Ag(C12H6N2O2)2](C7H3N2O7), the AgI atom is coordinated in a distorted tetrahedral geometry by four N atoms from two 1,10-phenanthroline-5,6-dione ligands, while the 3,5-dinitrosalicylate anion has only a short contact [2.847 (6) Å] between one of its O atoms and the AgI atom. The dihedral angle between the two 1,10-phenanthroline-5,6-dione ligands is 58.4 (1)°. There is an intramolecular O—HO hydrogen bond in the 3,5-dinitrosalicylate anion.
organic compounds
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In the crystal structure of the title compound, C18H13N5·H2O, adjacent molecules are linked by O—HN and N—HO hydrogen bonds, generating a chain propagating along [001].
metal-organic compounds
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The title compound, [Cu4Br4(C21H22Br2N4)4], features a macrocyclic Cu4L4 ring system in which each CuI atom is coordinated by one bromide ion and two N atoms from two 2,2′-dimethyl-1,1′-[2,2-bis(bromomethyl)propane-1,3-diyl]di(1H-benzimidazole) (L) ligands in a distorted trigonal–planar geometry. The L ligands adopt either a cis or trans configuration. The asymmetric unit contains one half-molecule with the center of the macrocycle located on a crystallographic center of inversion. Each bromide ion binds to a CuI atom in a terminal mode and is oriented outside the ring. The macrocycles are interconnected into a two-dimensional network by π–π interactions between benzimidazole groups from different rings [centroid–centroid distance = 3.803 (5) Å.
metal-organic compounds
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In the title compound, [Cd(C10H6NO2)2]n, the CdII atom is coordinated by three O atoms and two N atoms from four quinoline-3-carboxylate (L−) ligands, leading to a distorted trigonal–bipyramidal geometry. The L− ligands link the CdII atoms into a plane parallel to (100), with one ligand being tridentate, coordinating via the N atom and chelating a second Cd atom, and the other being bidentate, bridging two Cd atoms via the N and one O atom.. This two-dimensional network extends into a double-layer network by π–π interactions, with centroid–centroid distances of 3.680 (2) and 3.752 (2) Å. Another type of π–π interaction between pyridine rings [centroid–centroid distance = 3.527 (2) Å] leads to a three-dimensional supramolecular architecture.
metal-organic compounds
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In the title complex, [Mn(N3)2(C8H8N6)2], the complete molecule is generated by the application of twofold symmetry, and is in a distorted octahedral environment, coordinated by four N atoms of two bidentate 6-(pyridin-2-yl)-1,3,5-triazine-2,4-diamine ligands and two N atoms from two azide anions. The two chelated 6-(pyridin-2-yl)-1,3,5-triazine-2,4-diamine ligands form a dihedral angle 74.75 (5)°. The mononuclear molecules are alternatively linked into layers parallel to the ac plane via N—HN hydrogen bonds. Adjacent layers are connected into a three-dimensional supramolecular framework by futher N—HN hydrogen-bonding interactions.
metal-organic compounds
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In the title compound, {[Nd3(C7H3NO4)3(OH)3]·H2O}n, the NdIII atom is eight-coordinated by the three O atoms of three asymmetrically μ3-bridging hydroxide groups, by four carboxylate O atoms of four different pyridine-2,5-dicarboxylate (2,5-pydc) ligands, and by the N atom of a 2,5-pydc ligand. Six Nd atoms are connected by six hydroxide groups, forming an [Nd6(μ3-OH)6] cluster unit of symmetry -3 and a slightly compressed octahedral geometry. Adjacent [Nd6(μ3-OH)6] clusters are connected by the 2,5-pydc ligands, via O and N atoms, forming chains along the c axis. The remaining O atoms of the 2,5-pydc ligands link these chains into a three-dimensional framework. A disordered water molecule, located on a threefold rotation axis at the opposite side of the [Nd6(μ3-OH)6] cluster and exposed to each of the three Nd atoms, completes the structure.
organic compounds
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The title compound, C11H7NO4·H2O, contains a 3-carboxyquinolin-1-ium-2-carboxylate (qda) zwitterion and one water molecule. In the crystal, pairs of N—HO hydrogen bonds link the molecules into inversion dimers, and these dimers are further connected by O—HO hydrogen bonds into a three-dimensional supramolecular architecture. In addition, π–π interactions occur between pyridine and benzene rings from different qda ligands [centroid–centroid distance = 3.749 (1) Å] and the dihedral angles of the –CO2H and –CO2 groups to the quinoline system are 8.47 (3) and 88.16 (6)°, respectively.
organic compounds
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The title compound, C21H22Br2N4·0.5H2O, contains two benzimidazole groups which may provide two potential coordination nodes for the construction of metal–organic frameworks. The mean planes of the two imidazole groups are almost perpendicular, with a dihedral angle of 83.05 (2)°, and adjacent molecules are linked into a one-dimensional chain by π–π stacking interactions between imidazole groups of different molecules [centroid-to-centroid distances of 3.834 (2) and 3.522 (2) Å].
metal-organic compounds
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In the title compound, [Ag2(C10H6NO2)2]n, the AgI atom is coordinated by one N atom and two O atoms from three quinoline-3-carboxylate ligands in a T-shaped fashion, with an additional AgAg distance of 2.9468 (6) Å. The ligands connect the AgI atoms into a double-chain structure along [010]. Weak AgO interactions [AgO = 2.802 (3) and 2.877 (4) Å] link the double-chains into a layer network parallel to (101). π–π interactions are also observed in the layer network [centroid–centroid distances = 3.780 (3) and 3.777 (3) Å].