Abstract

An energetic coordination compound [Co2(C2H5N5)2(C7H3NO4)2(H2O)2]·2H2O (Hdatrz(C2H5N5)=3,5-diamino-1,2,4-triazole, H2pda(C7H5NO4)=pyridine-2,6-dicarboxylic acid) has been synthesized and characterized by elemental analysis, chemical analysis, IR spectroscopy, single-crystal X-ray diffraction and thermal analysis. X-ray diffraction analysis confirmed that the compound possessed a di-nuclear unit and featured a 3D super-molecular structure. Furthermore, a reasonable thermochemical cycle was designed based on the preparation reaction of the compound and the standard molar enthalpy of dissolution of reactants and products was measured by the RD496-2000 calorimeter. Finally, the standard molar enthalpy of formation of the compound was determined to be −(2475.0±3.1)kJ·mol−1 in accordance with Hess’s law. In addition, the specific heat capacity of the compound at T=298.15K was determined to be (1.13±0.02)J·K−1·g−1 by RD496-2000 calorimeter.

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