Crystal Structure and Hirshfeld Surface Analysis of One-Dimensional Copper(II) Coordination Polymer Incorporating Succinate and Tetramethylethylenediamine Ligands

Abstract

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-kappa N-2,N')copper(II)]-mu-succinato-kappa O-2(1):O-4] tetrahydrate], {[Cu(C4H4O4)(C6H16N2)]center dot 4H(2)O}(n) or {[Cu(succ)(tmeda)]center dot 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.