Synthesis and crystal structure of 5,17-diamino-11- <i>tert</i> -butyl-25,26,27,28-tetrapropoxy-23-[(triphenylmethyl)amino]calix[4]arene dichloromethane monosolvate

The title compound crystallizes as a di-chloro-methane monosolvate, C₆₃H₇₃N₃O₄·CH₂Cl₂. The main mol-ecule represents a calix[4]arene and possesses a pinched cone shape, with the two distal <i>para</i>-amino groups at the wide rim of the macrocycle being brought into close proximity due to steric repulsion between the bulky trityl-amino and <i>tert</i>-butyl groups attached to the other two distal positions of the wide rim. In the crystal, the calixarene mol-ecules are assembled by numerous C-H⋯π and van der Waals inter-actions, while the solvent mol-ecules reside in the cavities forming C-H⋯π and Cl⋯π contacts with the phenyl rings of the trityl group.