Crystal structure and thermodynamic properties of sodium d-gluconate Na[d-C₆H₁₁O₇](s)

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• 作者：You-Ying Di ; Yu-Han Zhang ; Yu-Pu Liu…
• 关键词：Sodium d ; gluconate ; X ; ray crystallography ; Lattice potential energy ; Isoperibol solution ; reaction calorimeter ; Standard molar enthalpy of formation ; Molar enthalpy of dissolution at infinite dilution
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：127
• 期：2
• 页码：1835-1843
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Physical Chemistry; Analytical Chemistry; Polymer Sciences; Inorganic Chemistry; Measurement Science and Instrumentation;
• 出版者：Springer Netherlands
• ISSN：1588-2926
• 卷排序：127

文摘

The sodium d-gluconate Na[d-C₆H₁₁O₇](s) has been synthesized and characterized by elemental analysis and X-ray crystallography. X-ray single-crystal analysis reveals that the compound exhibits an obvious chelate property of d-gluconate anions to sodium cation, and the latter is coordinated to six d-gluconate anions. The lattice potential energy of the compound and ionic volume of the d-gluconate anion are obtained from crystallographic data. In accordance with law of Hess, a reasonable thermochemical cycle is designed and the standard molar enthalpy of formation of the compound Na[d-C₆H₁₁O₇](s) is determined to be −(1472.68 ± 0.48) kJ mol−1 by use of an isoperibol solution-reaction calorimeter. Molar enthalpies of dissolution of Na[d-C₆H₁₁O₇](s) at various molalities are measured at T = 298.15 K in the double-distilled water. According to Pitzer’s electrolyte solution theory, molar enthalpy of dissolution of the title compound at infinite dilution is determined to be (23.783 ± 0.128) kJ mol−1.