Acta Phys. -Chim. Sin. ›› 2003, Vol. 19 ›› Issue (11): 1085-1088.doi: 10.3866/PKU.WHXB20031121

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Preparation and Standard Enthalpy of Formation of Zn(Thr) Zn(Thr)Ac2•2H2O

Ren Yi-Xia;Chen San-Ping;Gao Sheng-Li   

  1. Shaanxi Key Laboratory of Physico-Inorganic Chemistry, Department of Chemistry, Northwest University, Xi′an 710069
  • Received:2003-05-12 Revised:2003-07-21 Published:2003-11-15
  • Contact: Gao Sheng-Li

Abstract: The complex of Zn Ac2•2H2O and Threonine was prepared in the mixed solvent of water - acetone, the composition of the complex was identified as Zn(Thr) Ac2•2H2O by chemical, elemental analyses. The structure and thermal stability of the title complex were investigated by IR, XRD and TG - DTG. Enthalpy of solution of the complex was determined at 298.15 K in water by microcalorimetry.Standard molar enthalpy of formation of Zn(Thr)2+(aq,∞) and that of Zn(Thr) Ac2•2H2O (s)were calculated to be (955.24 ± 5.70) kJ•mol-1 and (-570.92±5.71) kJ•mol-1,respectively.

Key words: Zn(Thr)Ac2•, 2H2O, Preparation, Characterize, Standard molar enthalpy of formation