p-Cumyl­calix­[4]­arene-para-xyl­ene (1/1)

In the complex between p-cumyl­calix­[4]­arene and para-xyl­ene [systematic name: 4-(2-phenyl­iso­propyl)­calix­[4]­arene-1,4-di­methyl­benzene (1/1)], C₆₄H₆₄O₄·C₈H₁₀, the macrocycle has a cone conformation, which is stabilized by intramolecular hydrogen bonds. The guest para-xyl­ene mol­ecule is situated inside the cavity, giving an endo-calix complex. The host and guest molecules both have twofold rotation symmetry.