The title compound, [Cu(C4F7O2)2(C12H8N2)(H2O)], is mononuclear and contains a penta-coordinated Cu(II) ion. The geometry of Cu(II) ion can be described as distorted square-pyramidal with two O atoms of two butano-ate anions and two N atoms of the o-phenanthroline ligand occupying the basal plane, and a water O atom located at the axial position. In the crystal, C-H⋯(O,F) and O-H⋯(O,F) hydrogen bonds and π-π inter-actions [centroid-to-centroid distance 3.533 (2) Å] link the mol-ecules into a three-dimensional supra-molecular structure.
Keywords: copper(II) complex; crystal structure; heptafluorobutanoic acid; hydrogen bonding; o-phenanthroline.