SYNTHESIS OF A CHIRAL CALIXARENE - 5,11,17,23-TETRA(TERT-BUTYL)-25,27-BIS[((+)-CAMPHOR-10-SULFONYL)-OXY]-CALIX[4]ARENE-26,28- DIOL - CRYSTAL AND MOLECULAR-STRUCTURE OF ITS (1/2) COMPLEX WITH TOLUENE

The title compound was obtained by treatment of p-tert-butylcalix[4]arene with (+) camphorsulfonyl chloride in triethylamine and toluene. A (1:2) complex with toluene has been found. Its structure has been determined by X-ray crystallography. Crystals are triclinic with space group P1, a 16.426(3), b = 18.553(3), c 13.661(2) Angstrom, alpha = 94.78(2), beta 110.76(2), gamma = 72.83(2)degrees, V = 3720(2) Angstrom(3), d(c) = 1.127 g/cm(3) Z = 2. Refinement based on 10495 observed reflections led to a final R value of 0.100. The two independent molecules of calixarene in the asymmetric unit are in the cone conformation and the calixarene cavities are empty. The guest molecule occupies the interhost space. The norborane skelton of (+) camphorsulfonyl group is the same as ones found in literature. Only van der Waals interactions exist between the host and the guest molecules.