Coordination chemistry of new Cu(II) Schiff base complex containing a piperazine head unit

Schiff base complexes have remained an important and popular area of research due to their simple synthesis, versatility and diverse range of applications [1]. Piperazine is a well-knowbuilding block for novel supramolecular structures due to the presence of two weakly held terminal amino protons. The piperazinemoiety is a structural part of many analgesics, psychotropic and antitumor drugs [2]. A series of complexes containing pipirazine have been reported by us previously [3].Herein a polyamine containing piperazine moiety and related Schiff base macroacyclic ligand were designed and prepared. Then a new Schiff base complex is synthesized by reaction of prepared ligand with Cu(II) metal ion. In the resulted complex, Cu(II) is coordinated to ligand by four nitrogen (two from piperazine moiety and two nitrogen of imine bonds) and two phenolic oxygen. These Schiff-baseligand and its coppercomplexwere characterized by elemental analysis, IR spectroscopy, EI-Mass and X-ray analysis in the case of ligand