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The reaction of copper nitrate with succinic acid (succH) and N , N , N ', N '-tetra-methyl-ethylenedi-amine (TMEDA) in basic solution produces the complex catena -poly[[[( N , N , N ', N '-tetra-methyl-ethylenedi-amine-κ 2  N , N ')copper(II)]-μ-succinato-κ 2  O  1 : O  4 ] tetra-hydrate], {[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 carboxyl-ate 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 mol-ecules 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 inter-molecular contacts within the supra-molecular structure.

acta crystallographica. section e, crystallographic communications

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