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Citation: Qu Jing-Nian, Liu Yi, Li Lin-Wei, Qu Song-Sheng. Thermochemical Study of Mixed-ligands Complexes of L-glutamic Acid and L-arginine Acid with Copper Ions[J]. Acta Physico-Chimica Sinica, ;2001, 17(08): 753-756. doi: 10.3866/PKU.WHXB20010818 shu

Thermochemical Study of Mixed-ligands Complexes of L-glutamic Acid and L-arginine Acid with Copper Ions

1.
Department of Chemistry, Heng Yang Teacher′s College, Hengyang　421008;School of Chemistry and Molecular Sciences, Wuhan University, Wuhan　430072

Received Date: 20 January 2001
Available Online: 15 August 2001

The Mixedligands complexes of Lglutamic acid and Larginine with Cu(Ⅱ) was synthesized. The composition of the complex was determined by chemical analysis, element analysis and thermal gravity analysis. By solution calorimetry in a reaction calorimeter at 298.2 K,the dissolution enthalpy for the reactant, CuSO4 5H2O(s), LGlutamic acid(s) and LArginine(s), and the product, Cu稧lu稟rg稴O4 5H2O(s), were determined. They were dissolved in 2 mol稬－1 H2SO4 solution, respectively. A themochemistry cycle was designed, to obtain the coordinate reaction enthalpy change,=(19.745 0.033) kJ穖ol－1, and the standard formation enthalpy of the mixedligands complex was calculated,=(－3923.145 3.768)kJ穖ol－1. This result offers a basic thermochemistry parameter for the further research of this kind of compounds.
- Amino acids;Mixed-ligands complexes;Calorimetry;Thermochemistry; Standard formation enthalpy
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