The structures of the host compound 9-(4-methoxyphenyl)-9H-xanthen-9-ol (H) and of its inclusion compounds with naphthalene, anthracene, phenanthrene, pyrene and beta-naphthol have been elucidated. The inclusion compounds are isostructural with respect to the host positions, and all have stoichiometries of H . 1/2 guest with the guest molecules located on a center of inversion. The inclusion compounds can be formed by solid-solid reactions, and the kinetics of the reactions with naphthalene and beta-naphthol have half-lives of 44 and 31 min at room temperature, respectively.
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