SYNTHESIS AND SPECTROSCOPIC CHARACTERIZATION OF LITHIUM SALTS OF COPPER(II) AND NICKEL(II) COMPLEXES WITH 1,3-PROPANEDIAMINE-N,N,N’,N’-TETRAACETATE

The complexes Li 2 [Ni(1,3-pdta)]•5H 2 O and Li 2 [Cu(1,3-pdta)]•5H 2 O (where 1,3-pdta represents the 1,3-propanediaminetetraacetate anion) have been  synthesized and characterized by applying IR and UV-vis    spectroscopy. The obtained spectroscopic results of these complexes are discussed in relation to those for Mg[M(1,3-pdta)].8H 2 O complexes (M = Ni(II) and Cu(II)) of known crystal structure.