1D polymeric copper(I) and dinuclear silver(I) complexes of a bidentate Schiff base ligand: Synthesis, spectroscopic characterization and thermal studies

One-dimensional polymeric copper(I) complex [Cu((NO2-ba)(2)en)(mu-I)](n) (1) and dinuclear silver(I) complex [Ag((NO2-ba)(2)en)(mu-ONO2)](2) (2), where {(NO2-ba)(2)en = N,N'-bis(4-nitrobenzaldehyde)ethane1,2-diamine}, were synthesized, characterized by elemental analysis (CHN), FT-IR and 1H NMR spectroscopy, thermal analysis and their structure were confirmed by single crystal X-ray diffraction analysis. The Schiff base acts as NN-bidentate chelating ligand coordinated to Cu(I) and Ag(I) ions. The structural analysis revealed Cu(I) and Ag(I) centers were four-coordinated with N2I2 in 1 and N2O2 in 2 in form of a distorted tetrahedron. The complex 1 has a polymeric structure involving mu-I bridges while complex 2 has di-nuclear structure involving mu-O bridges with a molar proportion 1:1 of Cu(I) or Ag(I) to the Schiff base ligand. Thermogravimetric analysis of the complexes revealed their thermal stability and decomposition pattern. (C) 2016 Elsevier Ltd. All rights reserved.