1D polymeric copper(I) complex [Cu2(μ-(2,6-Cl-ba)2en)(μ-I)2]n with exceptionally short CuCu distance: Synthesis, characterization, thermal study and crystal structure

• New 1D polymeric copper(I) complex was synthesized and characterized.
• The (2,6-Cl-ba)2en acts as a bridging ligand forming the dinuclear [Cu2(m-(2,6-Cl-ba)2en)] groups.
• Such dinuclear groups are bridged iodine anionsto form a 1D copper(I) complex.

A new 1D polymeric three coordinated copper(I) complex, [Cu2(μ-(2,6-Cl-ba)2en)(μ-I)2]n, with the bidentate Schiff base ligand N,N′-bis(2,6-dichlorobenzylidene)ethane-1,2-diamine containing a flexible spacer (NCH2CH2N) was synthesized and characterized by elemental analyses, UV-Vis, FT-IR and 1H NMR spectroscopy and thermal analaysis. Its molecular structure was determined by single-crystal X-ray diffraction and shows the (2,6-Cl-ba)2en acts as a bis-monodentate bridging ligand forming the dinuclear [Cu2(μ-(2,6-Cl-ba)2en)] groups. Such dinuclear groups are bridged by two iodine anions [(μ-I)2] to form a 1D polymeric copper(I) complex. The copper(I) ions are coordinated in a distorted trigonal planar geometry by two I atoms and one nitrogen atom of Schiff base ligand (2,6-Cl-ba)2en.