Abstract
The guest-release process was investigated in terms of the activation energy evaluated by thermogravimetry for the en-Td-type clathratescatena-μ-[catena-μ-(ethylenediamine)cadmium(II) tetra-μ-cyanocadmate(II) or -mercurate(II)]-benzene(1/2), -benzene-d6(1/2), and -pyrrole(1/2), the Hofmannen-type clathratescatena-[catena-μ-(ethylenediamine)cadmium(II) tetra-μ-cyanonickelate(Il)]-benzene (1/2) and -pyrrole(1/2), the Hofmann-pn-type clathratecatena-[catena-μ-(dl- orl-propylenediamine (cadmium(II) tetra-μ-cyanonickelate(II)]-pyrrole(2/3), and the pn-Td-type clathratescatena-[catena-μ-(dl-propylenediamine) or -(l-propylenediamine)cadmium(II) tetra-μ-cyanocadmate(II)]-benzene(2/3). Values of the activation energy are correlated with the structural change in the metal complex host accompanied by the release of the guest molecules. The crystal structure ofcatena-[ethylenediaminecadmium tetra-μ-cyanonickelate(II)], the residual host of the Hofmann-en-type, has been analyzed to elucidate the correlation.
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