Bis(piperazinium) di-μ-chloro-bis­[tetra­chloro­bismuthate(III)] trihydrate

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—H...O, N—H...Cl and O—H...Cl inter­actions, stabilize the crystal structure.

Di-μ-oxo-bis­[(histidinato-κ³N,N,O)oxomolybdenum(V)] trihydrate

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 Mo...Mo 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—H...O hydrogen bonds and help to stabilize the crystal packing.

Bis(piperazinium) di-μ-chloro-penta­chloro­triiodo­dibismuthate(III) tetra­hydrate

The title salt, (C₄H₁₂N₂)₂[Bi₂Cl₇I₃]·4H₂O, was prepared by the reaction of bis­muth trichloride, potassium iodide and piperazine in a hydro­chloric acid medium. It is composed of piperazinium dications and dimeric [Bi₂Cl₇I₃]⁴⁻ tetra­anions, together with water of crystallization. The halobismuthate(III) tetra­anion is located on a center of inversion. Hydrogen bonds, including N—H...O, N—H...Cl, N—H...I, O—H...O, O—H...Cl and O—H...I inter­actions, are present in the crystal structure.