Selectivity Profiles of 5-(4-Methoxyphenyl)-5H-di benzo[a,d]cyclohepten-5-ol with Aromatic Solvents and Conformational Polymorphism of 10,11-Dihydro-5-(4-methoxyphenyl)-5H-dibenzo[a,d]cyclohepten-5-ol

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The structures of the host 5-(4-methoxyphenyl)-5H-dibenzo[a,d]cyclohepten-5-ol, H1, and its inclusion compounds with benzene, bromobenzene, and p-xylene (H:G = 1:0.5) and with pyridine (H:G = 1:1) have been elucidated. The selectivity profiles of H1 with the guests that had the same host:guest ratios were determined for all combination of guests. The structure of the compound 10,11-dihydro-5-(4-methoxyphenyl)-5H-dibenzo[a,d]cyclohepten-5-ol, H2, suffers a phase transformation at 181 K. We compared the polymorphs and concluded that we have obtained a subtle case of conformational polymorphism.