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Temperature dependence of the thermodynamic parameters of cobalt(II) clathrochelate: X-ray diffraction and calorimetric characteristics of the low temperature structural phase transition

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Abstract

The temperature dependence of heat capacity of the polycrystalline sample of cobalt(II) clathrochelate in a range of 6–300 K is studied. Based on the smoothed dependence C p(T), the entropy and enthalpy values in a temperature range of 8–300 K and their standard values at 298.15 K are calculated. In the C p(T) curve in a range of 50–70 K, a process is recorded whose entropy and enthalpy are 1.2 J·(K·mol−1) and 68 J·mol−1 respectively. A comparison of the results with the data of a multitemperature X-ray diffraction study makes it possible to attribute this process to the structural phase transition.

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Authors and Affiliations

  1. A. V. Nikolaev Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, Novosibirsk, Russia

    I. E. Paukov & Yu. A. Kovalevskaya

  2. Internationl Tomography Center, Siberian Division, Russian Academy of Sciences, Novosibirsk, Russia

    V. I. Ovcharenko & G. V. Romanenko

  3. A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia

    Ya. Z. Voloshin

Authors
  1. I. E. Paukov
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  2. Yu. A. Kovalevskaya
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  3. V. I. Ovcharenko
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  4. G. V. Romanenko
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  5. Ya. Z. Voloshin
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Correspondence to I. E. Paukov.

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Original Russian Text Copyright © 2012 by I. E. Paukov, Yu. A. Kovalevskaya, V. I. Ovcharenko, G. V. Romanenko, Ya. Z. Voloshin

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Translated from Zhurnal Strukturnoi Khimii, Vol. 53, No. 2, pp. 386–390, March–April, 2012.

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Paukov, I.E., Kovalevskaya, Y.A., Ovcharenko, V.I. et al. Temperature dependence of the thermodynamic parameters of cobalt(II) clathrochelate: X-ray diffraction and calorimetric characteristics of the low temperature structural phase transition. J Struct Chem 53, 388–392 (2012). https://doi.org/10.1134/S0022476612020278

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  • DOI: https://doi.org/10.1134/S0022476612020278

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