The synthetic methods of novel Cu (II) and adduct complexes, with selective azodyes containing nitrogen and oxygen donor ligands have been developed, characterized and presented. The prepared complexes fall into the stoichiometric formulae of [Cu (Ln) 2](A) and [Cu (Ln) 2 (Py) 2](B), where two types of complexes were expected and described. In type [(A)(1: 2)] the chelate rings are six-membered/four coordinate, whereas in type [(B)(1: ...
