One-dimensional coordination polymer of copper(I) thiocyanate with the Schlff base ligand N,N'-bis(3,4-dimethoxybenzylidene)butane- 1,4-diamine: synthesis, crystal structure, spectroscopic and thermal properties

摘要

A new one-dimensional polymeric copper(I)-thiocyanate complex with the Schiff base ligand N,N'-bis(3,4-dimethoxybenzylidene)butane-1,4-diamine, {Cu2 ((μ_(N,N')-3,4-MeO-ba)2bn)(μ_(1,3)-NCS)2}_n, was synthesized and characterized by elemental analysis, ~1H and ~(13)C NMR, FT-IR spectroscopy, and thermal analysis. The thermal behavior of the complex was studied using thermogravi-metry in order to evaluate thermal stability and thermal decomposition pathways. The molecular structure of the complex was determined by single-crystal X-ray diffraction which revealed that the coordination geometry around the copper(I) ion is distorted trigonal. The Schiff base ligand (3,4-MeO-ba)2bn acts as a bis-monodentate and bridging ligand (μ_(N,N')) and coordinates via two N atoms to the metal centers and adopts an E,E conformation. The coordination spheres of the metal atoms are completed by the N and S atoms from two thiocyanate anion bridges (μ_(1,3)-NCS), forming a zigzag chain propagating along [001].