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用半微量相平衡方法研究了硝酸锌 -亮氨酸 -水体系在 2 5℃及全浓度范围内的溶度性质 ,绘制了体系的相图和饱和溶液折光率曲线 ,发现并制备了未见报道的非一致溶解配合物 [Zn( Leu) ( NO3 ) 2 ( H2 O) ]· H2 O( A)和 Zn( Leu) 2 ( NO3 ) 2 · H2 O( B) ,通过化学分析、元素分析、 IR和 TG-DTG等对其组成、结构及热稳定性进行了研究 .用精密转动弹热量计测定配合物的标准燃烧能分别为 ( -1 2 6 92 .80± 5 .83)和 ( -1 5 34 5 .71±9.1 1 ) J/ g,求得它们的标准燃烧焓分别为 ( -4 5 2 3.2 2± 2 .0 8)和 ( -72 0 8.86± 4 .2 8) k J/ mol,标准生成焓分别为 ( -6 1 5 .6 7± 2 .2 7)和 ( -1 86 3.1 6± 4 .6 0 ) k J/ mol
The solubility properties of zinc nitrate-leucine-water system at 25 ℃ and the full range of concentration were studied by semi-micro phase-equilibria method. The phase diagram and the refractive index curve of saturated solution were plotted and found. The reported nonuniform lytic complexes [Zn (Leu) (NO3) 2 (H2O)] H2O (A) and Zn (Leu) 2 (NO3) 2H2O (B) were characterized by chemical analysis, elemental analysis , IR and TG-DTG were used to study the composition, structure and thermal stability of the complexes.The standard combustion energies of the complex were (-1 2 6 92.80 ± 5 .83) and ( -1 5 34 5 .71 ± 9.1 1) J / g and their standard enthalpies of combustion were respectively (-4 5 2 3.2 2 ± 2 .0 8) and (-72 0 8.86 ± 4.28) k The standard enthalpies of formation were (J 1 5 .6 7 ± 2. 2 7) and (-1 86 3 1 6 ± 4. 60) k J / mol, respectively