Abstract

The preparation, separation, characterization and crystal structure determinations of the 1+1 and 2+2 condensation products, p-t-butyl calix[4]crown-4 (1) and its dimer double calix[4]arene double crown-4 (2), resulting from the reaction of p-t-butylcalix[4]arene with triethylene glycol ditosylate in the presence of a base are reported.