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Five solid rare earth salicylate complexes were synthesized by low hydrated lathanide chloride and salicylic acid. The complexes in this experiment were identified as the general formula RE(HSal)_3·2H_2O(RE=La, Ce, Pr, Nd, Sm) by elemental analysis and EDTA volumetric analysis. IR spectra of the complexes show that carboxyl of salicylic acid coordinates to RE~ 3+ ions. Electrochemical behaviors of the complexes on the glass-carbon electrode were researched with cyclic voltammetry (CV). It is indicated that the electrochemical process of the complexes is a one-electron redox process and the electrochemical reversibility of complexes is less than that of the lanthanide chlorides. The constant-volume combustion energies of complexes, Δ_cU, were determined with a precise rotating-bomb calorimeter at 298.15 K. Their standard molar enthalpies of combustion, Δ_cH~θ_m, and standard molar enthalpies of formation, Δ_fH~θ_m, were calculated.
Five complexes rare earth salicylate complexes were synthesized by low hydrated lathanide chloride and salicylic acid. The complexes in this experiment were identified as the general formula RE (HSal) _3 · 2H 2 O (RE = La, Ce, Pr, Nd, Sm) analysis and EDTA volumetric analysis. IR spectra of the complexes show the carboxyl of salicylic acid coordinates to RE ~ 3+ ions. Electrochemical behaviors of the complexes on the glass-carbon electrodes were invented with cyclic voltammetry (CV). It is indicated that the electrochemical process of the complexes is one one-electron redox process and the electrochemical reversibility of complexes is less than that of the lanthanide chlorides. The constant-volume combustion energies of complexes, Δ_cU, were determined with a precise rotating-bomb calorimeter at 298.15 K Their standard molar enthalpies of combustion, Δ_cH ~ θ_m, and standard molar enthalpies of formation, Δ_fH ~ θ_m, were calculated.