Crystal structure and thermochemical properties of 1-dodecylamine hydrochloride (C12H28NCl)(s) |
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Authors: | Yu-Xia Kong You-Ying Di Ya-Qian Zhang Wei-Wei Yang Zhi-Cheng Tan |
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Institution: | aCollege of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China;bThermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China |
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Abstract: | Crystal structure of 1-dodecylamine hydrochloride (C12H28NCl)(s) has been determined by an X-ray crystallography. Lattice potential energy and the molar volumes of the solid compound and its cation were respectively obtained. The enthalpy of dissolution of the compound was measured by an isoperibol solution-reaction calorimeter at 298.15 K. The molar enthalpy of dissolution at infinite dilution was determined to be , and relative apparent molar enthalpies (ΦL), relative partial molar enthalpies (L2) of the compound and relative partial molar enthalpies (L1) of the solvent (double distilled water) at different concentrations m (mol kg−1) were obtained through fitted multiple regression equation by means of Pitzer's theory. Finally, hydration enthalpies of the substance and its cation were calculated by designing a thermochemical cycle in accordance with lattice potential energy and the molar enthalpy of dissolution at infinite dilution . |
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Keywords: | 1-Dodecylamine hydrochloride X-ray crystallography Lattice potential energy Isoperibol solution-reaction calorimetry Enthalpy of dissolution Hydration enthalpy |
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