Crystal structure and Hirshfeld surface analysis of one-dimensional copper(II) coordination polymer incorporating succinate and tetra­methyl­ethylene­diamine ligands

The reaction of copper nitrate with succinic acid (succH) and N,N,N′,N′-tetra­methyl­ethylenedi­amine (TMEDA) in basic solution produces the complex catena-poly[[[(N,N,N′,N′-tetra­methyl­ethylenedi­amine-κ(2) N,N′)copper(II)]-μ-succinato-κ(2) O (1):O (4)] tetra­hydrate], {[Cu(C(4)H(4)O(4))(C(6)H(16)N(2))]·4H(2)O}(n) or {[Cu(succ)(tmeda)]·4H(2)O}(n). Each carboxyl­ate group of the succinate ligand coordinates to a Cu(II) atom in a monodentate fashion, giving rise to a distorted square-planar geometry. The succinate ligands bridge the Cu(II) centres, forming one-dimensional polymeric chains. Hydrogen bonds between the ligands and water mol­ecules link these chains into sheets that lie parallel to the ac plane. Hirshfeld surface analysis, d (norm) and two-dimensional fingerprint plots were examined to verify the contributions of the different inter­molecular contacts within the supra­molecular structure.