metal-organic compounds
The title salt, (C4H12N2)2[Bi2Cl10]·3H2O, was prepared by reaction of bismuth trichloride and piperazine in a hydrochloric acid medium. It consists of piperazinium dications and dimeric [Bi2Cl10]4− tetraanions, the latter with twofold rotation symmetry, together with water of crystallization. Hydrogen-bond interactions, including N—HO, N—HCl and O—HCl interactions, stabilize the crystal structure.
metal-organic compounds
In the title dinuclear complex, [Mo2(C6H8N3O2)2O4]·3H2O, the Mo atoms, bridged by two μ-oxo atoms, have a distorted octahedral coordination environment. Besides the two bridging O atoms, the coordination of each Mo atom is completed by a terminal oxo atom and a tridentate histidinate ligand. The short MoMo distance of 2.5458 (4) Å may indicate the existence of an Mo—Mo metal bond. Intermolecular hydrogen bonding between the uncoordinated carboxylate O atoms and amino groups leads to a layer-like arrangement of the molecules. The uncoordinated water molecules link these layers via O—HO hydrogen bonds and help to stabilize the crystal packing.
organic compounds
The title compound, C7H5F2NO2, was prepared by the reaction of methyl 3,4-difluorobenzoate with excess NH2OH in basic solution. In the crystal structure, the molecules are linked into a three-dimensional extended network by N—HO, O—HO, C—HO and C—HF hydrogen-bond interactions.