Preparation and spectroscopic characterization of iron(II) and copper(II) complexes of a functionalized crown ether

Condensation between 4'-aminobenzo-15-crown-5- and 4-antipyrinecarboxaldehyde yielded the functionalized crown ether (L = 1,5-dimethyl-4-[(2,3,5,6,8,9,11,12-octahydro- 1,4,7,10,13-benzopentaoxacyclopentadecin-15-ylimino) methyl]-2-phenyl-1,2-dihydro-3H-pyrazol-3-one). A 1:1 (Na+:L) complex has been prepared. The reaction of Fe(II) and Cu(II) salts with L gave complexes of composition [Fe(L)Cl-2] and [Cu(L)(2)Cl-2]. Heteronuclear complexes [Fe(L)Cl2Na]ClO4 and [Cu(L)(2)Cl2Na]ClO4 have also been synthesized from the reactions of [Fe(L) Cl-2] and [Cu(L)(2)Cl-2] with NaClO4. The compounds have been characterized by microanalyses and spectroscopic methods.