The inclusion compounds of the host 9-(4-methoxyphenyl)-9H-xanthen-9-ol, C23H16O2, with the guests cyclohexane (CHEX), 1,4-dioxane (DIOX), and N,N-dimethylformamide (DMF) have been investigated. Their crystal structures have been determined and correlated with their thermal behavior. Both dioxane and cyclohexane guests gave structures that were isostructural with respect to the host and displayed (Host)OH···O(Host) hydrogen bonding. The guests were found on centers of inversion. For the DMF structure, we observed a different packing arrangement with both the host and the guest molecules in general positions, and for the first time, this host displayed (Host)−OH···(Guest) hydrogen bonding. Kinetics of desolvation for the 1,4-dioxane and N,N-dimethylformamide compounds were studied. Guest-exchange reactions were also performed.

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.