Preparation and study of rare earth 4-aminosalicylates

p-Aminosalicylates of Y, La and lanthanides prepared in the reaction of the ammonium p-aminosalicylate and lanthanide chlorides in solutions have the general formula Ln(C7H6O3N)3.nH2O, where n = 3 for La, Ce; n = 2 for Pr, Nd, Sm, Eu; n = 0 for Y, Gd-Lu. Their solubilities in water are of the order of 10-3mol dm-3. Heating above 350-450K leads to dehydration and decomposition at the same time. The IR and X-ray spectra for the obtained complexes of La-Nd are crystalline compounds. The way of metal-ligand coordination is discussed. (Author)