Inclusion Compounds of the Host 9-(4-Methylphenyl)-9H-xanthen-9-ol with a Series of Organic Guests

摘要

The host 9-(4-methylphenyl)-9H-xanthen-9-ol (H) forms inclusion compounds with the guests cyclohexane (H center dot 1/2CHEX), benzene (H center dot 1/2BENZ), 1,4-dioxane (H center dot 1/2DIOX), cyclohexanone (H center dot CYONE), N,N-dimethylformamide (H center dot DMF) and N, N-dimethylacetamide (H center dot DMA). For those guest molecules possessing electron acceptor atoms/functionalities hydrogen bonding with the host is the prominent mode of interaction and presents itself in the form of (Host)OH center dot center dot center dot O(Guest) linkages. The cyclohexane and benzene guests however, occupy voids created by neighbouring host molecules which form hydrogen bonded dimers of the form (Host)-OH center dot center dot center dot O(Host). The structures of the inclusion compounds were investigated and their thermal stabilities determined. Selectivity experiments were also conducted.