کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
673999 | 1459529 | 2013 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis, structural characterization and thermochemistry of copper pyridine 2,6-dicarboxylate trihydrate Synthesis, structural characterization and thermochemistry of copper pyridine 2,6-dicarboxylate trihydrate](/preview/png/673999.png)
Copper pyridine 2,6-dicarboxylate trihydrate (Cu(H2DPC)(DPC)·3H2O) was synthesized. X-ray crystallography, chemical analysis, and elemental analysis were applied to characterize the structure and composition of the complex. Low-temperature heat capacities of the complex were measured with a small sample automated adiabatic calorimeter. The smoothed molar heat capacities and thermodynamic functions of the complex relative to the standard reference temperature 298.15 K were calculated based on the fitted polynomial equation. A reasonable thermochemical cycle was designed, and the standard molar enthalpies of dissolution for the reactants and products of the synthesis reaction in a selected solvent were measured by an isoperibol solution-reaction calorimeter. Eventually, the standard molar enthalpy of formation of the title complex was calculated as −(2389.92 ± 2.53) kJ mol−1 by the Hess thermochemical cycle. In addition, the reliability of the designed thermochemical cycle was verified by UV–vis spectroscopy.
A novel complex, copper pyridine 2,6-dicarboxylate trihydrate (Cu(H2DPC)(DPC)·3H2O) was synthesized X-ray crystallography, chemical analysis, and elemental analysis were applied to characterize the structure and composition of the complex. Low-temperature heat capacities of the complex were measured. A polynomial equation of heat capacities as a function of temperature was fitted. The smoothed molar heat capacities and thermodynamic functions of the complex relative to the standard reference temperature 298.15 K were calculated. Standard molar enthalpies of dissolution for the reactants and products of the synthesis reaction in a selected solvent were measured. Standard molar enthalpy of formation of the title complex was calculated.Figure optionsDownload as PowerPoint slideHighlights
► Crystal structure of copper pyridine 2,6-dicarboxylate trihydrate was determined.
► Low-temperature heat capacities of the compound were measured.
► Smoothed molar heat capacities and thermodynamic functions were calculated.
► Standard molar enthalpy of formation of the title complex was derived.
Journal: Thermochimica Acta - Volume 555, 10 March 2013, Pages 23–29