Abstract: The interaction of a complex salt of nickel (II) chloride with diamino urea in the presence of glyoxal was studied. Various
complex salts of the cationic type based on nickel (II) with diamino urea were obtained and the corresponding macrocyclic
compounds were synthesized on their basis. The resulting complexes and macrocycles were studied by physicochemical methods of
Index terms: diaminourea, glyoxal, nickel (II) complexes, macrocycle.