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Thermochemical investigation of guest-host interactions in Werner clathrates of type [Ni(4-Etpy)4(NCS)2]·nG (G=naphthalene derivatives)

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Abstract

The stoichiometry of thermal decomposition and the thermochemistry were studied for [NiL4(NCS)2] (I) as a host complex, and for its clathrates of type [NiL4(NCS)2]·2G, where L=4-ethylpyridine and guest molecule G=1-methylnaphthalene in clathrate (II), 1-chloronaphthalene in (III) or 1-bromonaphthalene in (IV). For I, the loss of volatile components proceeds in three steps (−2L, −L, −L); the first steps for II–IV also involve the release of G (−2G, −2L). DSC and X-ray powder measurements indicated a phase transition in the host lattice, and allowed differentiation of the escape of G and L molecules. The enthalpy changes give the following sequence of thermodynamic stability for the studied chlathrates: I>II>III.

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Authors and Affiliations

  1. Department of Inorganic Chemistry, Slovak Technical University, 812 37, Bratislava

    E. Jóna, A. Sirota & V. Jorík

  2. Department of Physical Chemistry, Slovak Technical University, 812 37, Bratislava, Slovak Republic

    P. Šimon

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  1. E. Jóna
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  2. P. Šimon
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  3. A. Sirota
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  4. V. Jorík
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Jóna, E., Šimon, P., Sirota, A. et al. Thermochemical investigation of guest-host interactions in Werner clathrates of type [Ni(4-Etpy)4(NCS)2]·nG (G=naphthalene derivatives). Journal of Thermal Analysis 46, 539–548 (1996). https://doi.org/10.1007/BF02135033

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  • DOI: https://doi.org/10.1007/BF02135033

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