Poly[[aqua-μ₆-benzene-1,2,3-tricarboxyl­ato-μ₃-hydroxido-dizinc] hemihydrate]

In the title compound, {[Zn₂(C₉H₃O₆)(OH)(H₂O)]·0.5H₂O}_n, there are three independent Zn^II atoms present; two are located on special positions, viz a twofold rotation axis and an inversion centre, and the third is located in a general position. The Zn^II atom on the inversion centre is six-coordinated by four O atoms from four different benzene-1,2,3-tricarboxyl­ate anions and two OH⁻ anions. The Zn^II atom located on a twofold axis is four coordinated by two O atoms from two different benzene-1,2,3-tricarboxyl­ate anions and two OH⁻ anions. The third Zn^II atom, located in a general position, is five coordinated by three O atoms from three different benzene-1,2,3-tricarboxyl­ate anions, one OH⁻ anion and one water mol­ecule. Each benzene-1,2,3-tricarboxyl­ate anion bridges six Zn^II atoms, and the OH⁻ anion bridges three Zn^II atoms, resulting in the formation of a three-dimensional framework. A series of O—H...O hydrogen bonds involving the benzene-1,2,3-tricarboxyl­ate anions, the OH⁻ anion and the coordinating and the two water solvent mol­ecules further stablize the crystal structure. The two solvent water molecules show occupancies of 0.5 and 0.25.

Butyl­triethyl­ammonium tetra­chlorido­ferrate(III)

In the title compound, (C₁₀H₂₄N)[FeCl₄], no classical hydrogen bonds are observed. The butyl­triethyl­ammonium cations inter­act with the tetra­hedral [FeCl₄]⁻ anion through weak C—H...Cl inter­actions, forming a three-dimensional network.