Coordination behavior between zinc salts and L-α-methionine |
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作者单位: | GAO Shengli 1,LIU Jianrui 1,JI Mian 1, YANG Xuwu 1,ZHANG Fengxing 1 and LI Zhongjin 2 1. Department of Chemistry, Northwest University, Xi′an 710069, China; 2. Department of Chemical Engineering, Northwest Institute of Light Industry, Xianyang 712081, China |
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摘 要: | 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.
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收稿时间: | 19 January 1998 |
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