Synthesis and Characterization of Some Ni(II) and Cu(II) Complexes with Carboxymethyl Chitosan

Abstract

This research concerns the synthesis of two carboxymethyl chitosan (CMCs) complexes with Cu(II) and Ni(II). The synthesized complexes were characterized using (FT-IR) showing absorption peaks in the region (566 cm-1) which belongs to the bonds of Cu(II) with carboxymethyl chitosan [Cu(CMCs)2] and (580 cm-1) which belongs to the bonds of Ni(II) with carboxymethyl chitosan [Ni(CMCs)2]. Molar conductivity was determined for both complexes [Cu(CMCs)2] and [Ni(CMCs)2] and the results showed that these complexes non-electrolytes . UV-visible has been also recorded for [Cu(CMCs)2] complex solution (0.50 x 10-3M) is absorbed at (295 nm). It is proposed that [Cu(CMCs)2] possess a square planar structure. Whereas [Ni(CMCS)2] is absorbed at (290 nm) supposing that the structure of this complexes is tetrahedral. The absorbance of both complexes can be attributed to the (π→π*).