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.