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Synthesis, heat capacity and enthalpy of formation of [Ho2(l-Glu)2(H2O)8](ClO4)4·H2O |
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| Authors: | Xin-Min Wu Xue-Chuan Lv |
| Institution: | a Department of Materials and Chemical Engineering, Beijing Institute of Petro-chemical Technology, Beijing 102617, PR China b Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China c Department of Chemistry, College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072, PR China |
| Abstract: | A complex of holmium perchlorate coordinated with l-glutamic acid, Ho2(l-Glu)2(H2O)8](ClO4)4·H2O, was prepared with a purity of 98.96%. The compound was characterized by chemical, elemental and thermal analysis. Heat capacities of the compound were determined by automated adiabatic calorimetry from 78 to 370 K. The dehydration temperature is 350 K. The dehydration enthalpy and entropy are 16.34 kJ mol−1 and 16.67 J K−1 mol−1, respectively. The standard enthalpy of formation is −6474.6 kJ mol−1 from reaction calorimetry at 298.15 K. |
| Keywords: | Solution-reaction calorimetry Complexes of rare earth l-Glutamic acid" target="_blank">l-Glutamic acid l-Glu)2(H2O)8](ClO4)4·" target="_blank">[Ho2(l-Glu)2(H2O)8](ClO4)4· H2O Heat capacity Standard enthalpy of formation |
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