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Thermal Decomposition Mechanism and Thermodynamic Properties of [Cd(NTO)4Cd(H2O)6]·4H2O

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Abstract

[Cd(NTO)4Cd(H2O)6]·4H2O was prepared by mixing the aqueous solution of 3-nitro-1,2,4-triazol-5-one and cadmium carbonate in excess. The single crystal structure was determined by a four-circle X-ray diffractometer. The crystal is monoclinic, space group C2/c with crystal parameters of a=2.1229(3) nm, b=0.6261(8) nm, c=2.1165(3) nm, β=90.602(7)°, V=2.977(6) nm3, Z=4, Dc=2.055 g·cm−3, μ=15.45 cm−1, F(000)=1824, λ(MoKα)=0.071073 nm. The final R is 0.0282. Based on the results of thermal analysis, the thermal decomposition mechanism of [Cd(NTO)4Cd(H2O)6]·4H2O was derived. From measurements of the enthalpy of solution of [Cd(NTO)4Cd(H2O)6]·4H2O in water at 298.15 K, the standard enthalpy of formation, lattice energy, lattice enthalpy and standard enthalpy of dehydration have been determined as -(1747.8±4.8), -2394, -2414 and 313.6 kJ mol−1 respectively.

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Authors and Affiliations

  1. Department of Chemical Engineering, Northwest University, Xian, 710069

    J. Song

  2. Xian Modern Chemistry Research Institute, 710065, Shaanxi

    R. Hu, B. Kang, Y. Lei & F. Li

  3. Chengdu Branch of Academia Sinica, Chengdu, 610041, P. R. China

    K. Yu

Authors
  1. J. Song
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  2. R. Hu
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  3. B. Kang
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  4. Y. Lei
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  5. F. Li
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  6. K. Yu
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Song, J., Hu, R., Kang, B. et al. Thermal Decomposition Mechanism and Thermodynamic Properties of [Cd(NTO)4Cd(H2O)6]·4H2O. Journal of Thermal Analysis and Calorimetry 55, 797–806 (1999). https://doi.org/10.1023/A:1010121514909

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  • DOI: https://doi.org/10.1023/A:1010121514909

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