Reactions of Metal Chelates. IV. The Reactions of Bis(salicylaldehydato)-copper(II) with Diethylenetriamine and Triethylenetetramine

Abstract The reactions of bis(salicylaldehydato)copper(II) with diethylenetriamine and triethylenetetramine were investigated under several different conditions. In water, in the absence of other reagents, the reactions gave uncharged bis (salicylaldehyde)-diethylenetriamine- and -triethylenetetramine-copper(II), respectively. In the presence of an acid the resulting complexes were the respective cation complexes, in which only one of the two terminal nitrogen atoms was in the form of Schiff base with salicylaldehyde. In the presence of a salt, the resulting complex from diethylenetriamine was a cation complex, and that from triethylenetetramine an uncharged complex. Three new copper(II) chelates were obtained.