Beschreibung:
<jats:p>(Dicyanamido-κ<jats:italic>N</jats:italic><jats:sup>1</jats:sup>)bis(5,5′-dimethyl-2,2′-bipyridine-κ<jats:sup>2</jats:sup><jats:italic>N</jats:italic>,<jats:italic>N</jats:italic>′)copper(II) tetrafluoroborate, [Cu{N(CN)<jats:sub>2</jats:sub>}(C<jats:sub>12</jats:sub>H<jats:sub>12</jats:sub>N<jats:sub>2</jats:sub>)<jats:sub>2</jats:sub>]BF<jats:sub>4</jats:sub>, (I), and (dicyanamido-κ<jats:italic>N</jats:italic><jats:sup>1</jats:sup>)bis(5,5′-dimethyl-2,2′-bipyridine-κ<jats:sup>2</jats:sup><jats:italic>N</jats:italic>,<jats:italic>N</jats:italic>′)copper(II) perchlorate, [Cu{N(CN)<jats:sub>2</jats:sub>}(C<jats:sub>12</jats:sub>H<jats:sub>12</jats:sub>N<jats:sub>2</jats:sub>)<jats:sub>2</jats:sub>]ClO<jats:sub>4</jats:sub>, (II), are isomorphous and consist of [Cu{N(CN)<jats:sub>2</jats:sub>}(mbpy)<jats:sub>2</jats:sub>]<jats:sup>+</jats:sup>cations (mbpy is 5,5′-dimethyl-2,2′-bipyridine) and BF<jats:sub>4</jats:sub><jats:sup>−</jats:sup>or ClO<jats:sub>4</jats:sub><jats:sup>−</jats:sup>anions, respectively. The Cu<jats:sup>II</jats:sup>cations in both structures are five-coordinated in distorted trigonal bipyramidal environments by four N atoms of two mbpy ligands and one N atom of the dicyanamide anion, which is coordinated in a monodentate manner in the equatorial plane, with Cu—N distances of 1.980 (3) and 1.977 (2) Å in (I) and (II), respectively. The two axial Cu—N<jats:sub>mbpy</jats:sub>bonds have very similar values [1.986 (1) Å on average] and are shorter than the other two equatorial Cu—N<jats:sub>mbpy</jats:sub>bonds. These have different values in the individual compounds but nevertheless form two pairs of similar bonds in (I) and (II) [2.066 (8) and 2.112 (2) Å, respectively, on average]. Besides the ionic forces in both structures, the structures are stabilized by C—H...N and C—H...<jats:italic>X</jats:italic>hydrogen bonds (<jats:italic>X</jats:italic>= F and O, respectively), and by π–π interactions between the pyridine rings of neighbouring mbpy molecules.</jats:p>