X-ray analysis of the bisphenol-A-type macrocyclic carbonate trimer

Collection of the single crystal X-ray refraction data of the Bisphenol-A-type Macrocyclic oligocarbonate trimer (c-3mer) at room temperature was carried out. The single crystal of the cyclic trimer that is recrystallized from ethyl acetate showed solvent molecule in the center of macro ring. Similarly, cyclic tetramer (c-4mer) contained two p-xylene molecules. Smaller dimer (c-2mer) did not afford co-crystal with solvent. Conformation of the carbonate in c-3mer was s-cis and s-cis as in c-4mer. A relationship between the conformation of carbonate and noncatalyst polymerization activity was not found.