Synthesis and Characterization of New Cu(II) and [Cu^IIMn^II] Complexes of Macrocyclic Oxamides

Abstract

Two new Cu(II) complexes of [14]N₄ and [15]N₄ macrocyclic oxamides. [CuL¹] and fCuL²] [L¹ and L² are the dianions of 2, 3-dioxo-5, 6:14, 15-dibenzo-7, 13-bis(ethoxycarbonyl)-l, 4, 8, 12-tetraazacyclotetradeca-7, 12-diene and 2, 3-dioxo-5, 6:9, 10:13, 14-tribenzo-7, l 2-bis(ethoxycarbonyl)-1, 4, 8, 11 -tetraazacyclo-tetradeca-7, 11-diene, respectively], have been prepared by the template reactions of 2, 2′-(oxalyldiimino)bis(phenylglyoxylate) with diamines and cupric acetate in the presence of triethylamine. Using the strategy of “complexes as ligands”, two tetranuclear complexes of the formula [(CuL¹)₃Mn](ClCO₄)₂ and [(CuL²)3Mn](ClO₄)₂ have been synthesized. The complexes have been characterized by means of elemental analyses, IR and electronic spectra, conductivity and magnetic susceptibility measurements.