Crystal structure and Hirshfeld surface analysis of one-dimensional copper(II) coordination polymer incorporating succinate and tetra-methyl-ethylene-diamine ligands.

The reaction of copper nitrate with succinic acid (succH) and ,,','-tetra-methyl-ethylenedi-amine (TMEDA) in basic solution produces the complex -poly[[[(,,','-tetra-methyl-ethylenedi-amine-κ ,')copper(II)]-μ-succinato-κ : ] tetra-hydrate], {[Cu(CHO)(CHN)]·4HO} or {[Cu(succ)(tmeda)]·4HO} . Each carboxyl-ate group of the succinate ligand coordinates to a Cu atom in a monodentate fashion, giving rise to a distorted square-planar geometry. The succinate ligands bridge the Cu centres, forming one-dimensional polymeric chains. Hydrogen bonds between the ligands and water mol-ecules link these chains into sheets that lie parallel to the plane. Hirshfeld surface analysis, and two-dimensional fingerprint plots were examined to verify the contributions of the different inter-molecular contacts within the supra-molecular structure.