The structures of the inclusion compounds formed by the host 9-(2-naphthyl)-9H-xanthen-9-ol (H) with 1,4-dioxane (DIOX), cyclohexanol (CYOL), and cyclohexanone (CYONE) have been elucidated. The selectivity profile of the host with respect to the guest pairs dioxane/cyclohexanol and dioxane/cyclohexanone have been analyzed, as well as the mixed guest compound H·½DIOX·1CYONE. Thermal analysis and kinetics of desorption of these inclusion compounds have been performed and correlated with the structures.

The host compound 9-(4-methoxyphenyl)-9H-xanthen-9-ol (H) forms inclusion compounds with the solid guests 1-naphthylamine, 8-hydroxyquinoline, triethylenediamine and acridine. All four structures were successfully solved in the triclinic spacegroup P 1. Similar packing motifs arise for the 1-naphthylamine and the 8-hydroxyquinoline inclusion compounds where the main interaction is of the form (host)-OHÁ Á ÁO-(host). Both the triethylenediamine and the acridine guests hydrogen bond to the host molecule. The thermal stabilities and kinetics of the solid-solid reactions were determined.

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