Concomitant polymorphs of p-iso-propylcalixarene†
Sublimation of p-iso-propylcalixarene under reduced pressure results in the concomitant formation of two new polymorphs (forms IIP and IIIP). Both forms consist of interdigitated dimers of calixarene molecules, as does the known form IP. Despite similar inclusion behaviour to that of p-tert-butylcalixarene, p-iso-propylcalixarene does not appear to favour the formation of a transiently porous material.
- This article is part of the themed collection: Polymorphism