metal-organic compounds
Open access
In the title compound, [Cu(C7H6N2O3)(C6H8N2)(H2O)], the CuII ion is in a distorted square-pyramidal N3O2 environment formed by two bidentate chelating ligands in the equatorial coordination sites and one water molecule in the apical direction. In the crystal, O—HO, N—HO and O—HN hydrogen bonds link the complex molecules into a three-dimensional supramolecular network.
metal-organic compounds
Open access
In the title binuclear complex, [Cu2(NO3)3(C18H16N6Se)(H2O)3]NO3·H2O, the CuII ions are pentacoordinated in a tetragonal–pyramidal geometry. In both cases, the equatorial planes are formed by a chelating pyrazole-pyridine group, a water molecule and a nitrate O atom, whereas the apical positions are occupied by a water molecule for one CuII ion and a nitrate O atom for the other. The organic selenide ligand adopts a trans configuration with respect to the C–Se–C plane. Numerous intermolecular O—HO and N—HO hydrogen bonds between the coordinating and lattice water molecules, nitrate anions and pyrazole groups are observed. π–π stacking interactions between the pyridine rings [averaged centroid–centroid distance = 3.652 (5) Å] are also present. The lattice water molecule is equally disordered over two sets
of sites.
organic compounds
Open access
In the title compound, 2C10H15N4Se+·Cl−·OH−, a singly protonated molecule of the organic selenide participates in hydrogen bonding with neighboring molecules, forming zigzag chains along [001]. The molecule adapts a cis bridging mode with a C—Se—C angle of 102.13 (15)°. π–π stacking interactions are observed between the closest pyrazole rings of neighboring chains [centroid–centroid distance = 3.888 (1) Å] and hydrogen bonding occurs through bridging chloride anions and hydroxide groups. Additionally, O—HCl hydrogen bonds are formed.