Bis­(dicyan­amido)(diethyl­enetri­amine‐κ3N)copper(II) and (dicyan­amido)(tri­ethyl­enetetr­amine‐κ4N)copper(II) dicyan­amide

Two new complexes, [Cu(C₂N₃)₂(dien)] (dien is diethyl­ene­tri­amine, C₄H₁₃N₃), (I), and [Cu(C₂N₃)(trien)](C₂N₃) (trien is triethyl­ene­tetr­amine, C₆H₁₈N₄), (II), have been characterized by single‐crystal X‐ray diffraction. Both complexes display a distorted tetragonal–pyramidal geometry. In (I), the Cu atom is coordinated in the basal plane by three diethyl­ene­tri­amine N atoms [Cu—N = 2.000 (2), 2.004 (2) and 2.025 (2) Å] and one terminal N atom [Cu—N = 1.974 (2) Å] from one monodentate dicyan­amide group, and in the apical position by one terminal N atom [Cu—N = 2.280 (2) Å] from the other monodentate dicyan­amide group. In (II), the Cu atom is surrounded by four triethyl­ene­tetr­amine N atoms [Cu—N = 2.012 (2), 2.014 (2), 2.019 (2) and 2.031 (2) Å in the basal plane] and a terminal N atom [Cu—N = 2.130 (2) Å in the apical site] from one monodentate dicyan­amide group. The other dicyan­amide anion is not directly coordinated to the metal atom. In both (I) and (II), hydro­gen‐bond interactions between the uncoordinated terminal N atoms of two dicyan­amide ions and the amine H atoms lead to the formation of three‐dimensional networks.