Abstract

New square-planar copper(II) complexes of 13-membered dioxa diaza macrocyclic ligands, (12-methyl-12-nitro-4,7-dioxa-1,10-diazacyclotridecane)copper(II), [Cu(L 1)] 2+; and (12,12-dicarboxyethyl-4,7-dioxa-1,10-diazacyclotridecane)copper(II), [Cu(L 2)] 2+; with perchlorate, hexafluorophosphate and tetrachlorozincate as counter ions have been prepared from the one-pot template condensation reaction of formaldehyde and 1,8-diamino-3,6-dioxaoctane with the carbon acids nitroalkane or diethylmalonate in the presence of the copper(II) ion. Elemental analyses, FTIR, UV–Vis, conductometric, cyclic voltametry and magnetic measurements have been used to characterize the copper(II) complexes of these dioxa diaza macrocycles.

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