Pyridine vapour formation from the title clathrates is accompanied by the destruction of both the clathrate phase and the host complex: 1/3[MPy4(NO3)2]·2Py(solid)=1/3[MPy3(NO3)2](solid)+Py(gas); the standard thermodynamic parameters of these processes are ΔH0=59.5(2) and 64.6(4)kJmol-1ΔS0298=156.6(6) and 168(1)Jmol-1K-1ΔG0298=12.8(2) and 14.4(6)kJmol-1, for the Co- and Ni-clathrate, respectively.
E. A. Ukraintseva, D. V. Soldatov, V. A. Logvinenko and Y. A. Dyadin, Mendeleev Commun., 1997, 7, 102 DOI: 10.1070/MC1997v007n03ABEH000705
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