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A new flexible bis-bidentate N 2 S 2  Schiff base ligand (2,4-Cl-ba) 2 dapte =  N , Nʹ -bis-(2,4-dichlorobenzaldehyde)-1,2-di( o -iminophenylthio)ethane and its copper(I) coordination polymer [Cu 2 ( μ -I) 2 ( μ -(2,4-Cl-ba) 2 dapte)] n , were synthesized and characterized by CHN elemental analysis, FT-IR and UV-Vis spectroscopy and single-crystal X-ray diffraction. The molecule of (2,4-Cl-ba) 2 dapte adopts a  trans  conformation of the 1,2-di( o -iminophenylthio)ethane unit. The (2,4-Cl-ba) 2 dapte acts as a bis-bidentate ligand with two iminic nitrogen and two sulfur atoms, coordinating to copper(I) ions in an anti-form leading to the dinuclear Cu 2 ( μ -(2,4-Cl-ba) 2 dapte) groups. These groups are then bridged by two iodide anions to form a copper(I) coordination polymer [Cu 2 ( μ -I) 2 ( μ -(2,4-Cl-ba) 2 dapte)] n . The coordination geometry around the copper(I) ions is a distorted tetrahedron. Finally, a nano-sized form of the copper(I) coordination polymer [Cu 2 ( μ -I) 2 ( μ -(2,4-Cl-ba) 2 dapte)] n  was prepared by an ultrasonic bath assisted process and characterized by elemental analysis, FT-IR and SEM.

Crystal structures of the bis-bidentate N2S2 Schiff base ligand and its copper(I) coordination polymer