Two crystal structures of copper(II) complexes and adducts based on the neutral <i>N</i> ¹ , <i>N</i> ¹ -dimethyl- <i>N</i> ² -(pyridin-2-ylmethyl)ethane-1,2-diamine ligand

From the reaction of copper(II) chloride dihydrate with <i>N</i> ¹,<i>N</i> ¹-dimethyl-<i>N</i> ²-(pyridin-2-ylmeth-yl)ethane-1,2-di-amine (denoted N^N^N) a new species comprising three distinct complexes crystallized, namely, aqua-chlorido-[<i>N</i> ¹,<i>N</i> ¹-dimethyl-<i>N</i> ²-(pyridin-2-ylmeth-yl)ethane-1,2-di-amine-κ³ <i>N</i>,<i>N</i>',<i>N</i>'']copper(II)chlorido-[<i>N</i> ¹,<i>N</i> ¹-dimethyl-<i>N</i> ²-(pyridin-2-ylmeth-yl)ethane-1,2-di-amine-κ³ <i>N</i>,<i>N</i>',<i>N</i>'']copper(II) tetra-chlorido-cuprate(II), [CuCl(C₁₀H₁₇N₃)(H₂O)][CuCl(C₁₀H₁₇N₃)][CuCl₄] or [Cu(N^N^N)(H₂O)Cl][Cu(N^N^N)Cl₂][CuCl₄], the latter two of which form an adduct. This complex was reacted with ammonium thio-cyanate to form [Cu(N^N^N)(NCS)₂], which crystallized with two independent mol-ecules and a partial water in the asymmetric unit very similarly to the already reported structure of this compound. Both crystal structures show a rather complex set of inter-molecular inter-actions including hydrogen bonding and what may be described as chalcogen bonding, pnictogen bonding and/or coinage bonding. The mol-ecular structures, intra-molecular inter-actions and packing patterns are discussed in detail and the more unusual ones are set into the context of structures available in the literature.