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Citation: REN Yi-Xia, CHEN Pei, CHEN San-Ping, YANG Xu-Wu, GAO Sheng-Li. Preparation and Standard Enthalpy of Formation of Zn(Met)Ac₂·H₂O[J]. Chinese Journal of Applied Chemistry, ;2004, 21(6): 585-588. shu

Preparation and Standard Enthalpy of Formation of Zn(Met)Ac₂·H₂O

1.
a Shaanxi Key Laboratory of Physico-Inorganic Chemistry, Department of Chemistry, Northwest University, Xi'an 710069;
2.
b College of Chemistry and Chemical Engineering, Yan'an Universituy;
3.
c Xi'an Modern Chemical Institute, Xi'an

Corresponding author: GAO Sheng-Li,
Received Date: 18 July 2003
Available Online: 20 November 2003
Fund Project: 国家自然科学基金(20171036) (20171036)陕西省自然科学基金(2002B03)资助项目 (2002B03)

The complex of methionine with Zn(Met)Ac₂·H₂O was prepared in a water-acetone mixture. Its composition was identified as Zn(Met)Ac₂·H₂O by chemical and elemental analyses. The structure and thermal stability of the complex were investigated by IR, DSC and TG-DTG, its enthalpies in dehydrolysis and decomposition courses were obtained as 15.30 J/g and 357.80 J/g, respectively. The constant volume combustion energy of the complex, Δ_cE, was determined as (-6 472.11±2.20) kJ/mol by a precise rotating-bomb calorimeter at 298.15 K, its standard enthalpy of combustion, Δ_cH_m^θ, and standard enthalpy of formation, Δ_fH_m^θ, were calculated as (-6 475.21±2.20) kJ/mol and (-429.04±2.59) kJ/mol, respectively.
- methionine,
- zinc acetate,
- complex,
- preparation
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Preparation and Standard Enthalpy of Formation of Zn(Met)Ac₂·H₂O