Synthesis, Characterization and Thermochemistry Properties of RE(III) with 2-oxo-propionic Acid Salicyloyl Hydrazone Complexes

A series of new light rare earth complexes of RE(C10H8N2O4) (C10H9N2O4)·nH2O (RE = La, Ce, Pr, Nd, Sm, Eu, Gd) have been synthesized. The composition of the complexes is determined by elemental analysis, IR, UV, fluorescence, and XRD. The enthalpies of dissolution for these complexes in DMF were measured and it was found that the correlation of the enthalpy of dissolution for the complexes and atomic number was not monotonic. The enthalpy of dissolution curves of the light rare earth complexes are regarded as the front two groups of “quadripartite effect”