Synthesis and assessment of compounds trans-N,N′-bis(9-phenyl-9-xanthenyl)cyclohexane-1,4-diamine and trans-N,N′-bis(9-phenyl-9-thioxanthenyl)cyclohexane-1,4-diamine as hosts for potential xylene and ethylbenzene guests

Comparing the host behaviour of roof-shaped compounds trans-9,10-dihydro-9,10-ethanoanthracene-11,12-dicarboxylic acid and its dimethyl ester in the presence of mixtures of xylene and ethylbenzene guests

Each p-Xy guest molecule is surrounded by six dicarboxylic acid host molecules, forming a continuous intermolecular hydrogen-bonded motif through their carboxylic acid functionalities to form a cage-like structure in which the guests are trapped.

Selectivity behaviour of two roof-shaped host compounds in the presence of xylene and ethylbenzene guest mixtures

α,α-Diphenyl-9,10-dihydro-9,10-ethanoanthracene-11-methanol possessed an enhanced selectivity for o-Xy when recrystallized from various xylene and EB mixed solvents (84.5–93.7%).