Crystal structure of bis(μ-2,3,4,5-tetrafluorobenzoato-κ2O:O′)bis[(1,10-phenanthroline-κ2N:N′)(2,3,4,5-tetrafluorobenzoato-κO)copper(II)] dihydrate

Abstract

In the title compound, [Cu2(C7HF4O2)4(C12H8N2)2]·2H2O, the CuII ion has a square-pyramidal coordination sphere. The basal plane consists of two N atoms [Cu—N = 2.008 (3) and 2.032 (3) Å] from the phenanthroline ligand, and of two carboxylate O atoms [Cu—O = 1.942 (3) and 1.948 (3) Å] from two 2,3,4,5-tetrafluorobenzoate anions. Another 2,3,4,5-tetrafluorobenzoate anion provides the apical carboxylate O atom [Cu—O = 2.262 (3) Å] and bridges two CuII ions into a binuclear centrosymmetric dimer. Intramolecular π–π interactions between one of the tetrafluorobenzene rings and the middle of the phenenanthroline rings [3.617 (3) Å] stabilize the molecular configuration. O—H...O hydrogen bonds between the lattice water molecules and the unbound carboxylate O atoms of the metal complexes leads to the formation of a chain structure parallel to [100].

Keywords

• crystal structure
• phenanthroline ligands
• tetrafluorobenzoate ligands
• copper(II) complex
• hydrogen bonding