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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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