Preparation and properties of rare earth element 2,3-dihydroxybenzoates

Complexes of lanthanide(III) (La-Lu) and Y(III) with 2,3-dihydroxybenzoic a cid were prepared and their IR spectra, solubility in water at 293 K and th ermal decomposition were investigated. When heated, the complexes with a ge neral formula Ln(C7H5O4)(3).nH(2)O, where n = 0 for La-Tb, n = 4 for Dy-Tm and Y,n = 2 for Yb-Lu decompose to the oxides Ln(2)O3, CeO2, Pr6O11 and Tb4 O7 with intermediate formation of Ln(C7H5O4)(C7H4O4) (with the exception of cerium complex).