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The solubility properties of ZnCl-2/ZnAc-2/ZnSO-4_Met_H-2O systems at 25℃ in the whole cocentration range have been investigated by phase equilibrium method. The results indicate that ZnAc-2 and ZnSO-4 systems are both simple systems, which do not exist any compound; there are 2 complexes formed in ZnCl-2 system: Zn(Met)Cl-2 and Zn(Met)-2Cl-2·2H-2O. Under the direction of phase equilibrium result, 2 solid complexes have been prepared in water and characterized by chemical analysis, IR, X_ray diffraction. Their combustion energies have also been determined by means of a RBC_type_1 rotating_bomb calorimeter, and their standard enthalpies of formation, Δ f, coor(s)H O-, have been calculated which are (-828.32±3.00) kJ·mol -1 and (-1 117.08±6.15) kJ·mol -1, respectively.
The solubility properties of ZnCl - 2 / ZnAc - 2 / ZnSO - 4_Met_H - 2O systems at 25 ° C in the whole cocentration range have been investigated by phase equilibrium method. The results indicate that ZnAc - 2 and ZnSO - 4 systems are both simple systems, which do not exist any compound; there are 2 complexes formed in ZnCl -2 system: Zn (Met) Cl -2 and Zn (Met) 2Cl - 2 · 2H - 2O. Under the direction of phase equilibrium result, 2 solid complexes have been prepared in water and characterized by chemical analysis, IR, X_ray diffraction. Their combustion energies have also been determined by means of a RBC_type_1 rotating_bomb calorimeter, and their standard enthalpies of formation, Δ f, coor (s) H O-, have been calculated which are (-828.32 ± 3.00) kJ · mol -1 and (-1 117.08 ± 6.15) kJ · mol - 1, respectively.