Low-dimensional compounds containing cyanide groups. XXVI. (Dicyanamido-κN¹)bis­(5,5′-dimethyl-2,2′-bi­pyridine-κ²N,N′)copper(II) complexes with tetra­fluoro­borate and perchlorate anions

The Cu atoms in the title complexes are five-coordinated in distorted trigonal bipyramidal environments by four N atoms of two 5,5′-dimethyl-2,2′-bi­pyridine ligands and one N atom of a dicyanamide anion, which is coordinated in a monodentate manner in the equatorial plane. The structures are stabilized by C—H...N and C—H...X hydrogen bonds (X = F and O) and π–π inter­actions between pyridine rings.