research papers
The structure of the DMSO (dimethyl sulfoxide) solvate of the macrocyclic [22] dimer, 17,17,37,37-tetramethyl-2,12,22,32-tetraoxa-7,27-dithianonacyclo[36.2.2.2.-2.2.2.2.2.2]hexapentaconta-3,5,8,-10,13,15,18,20,23,25,28,30,33,35,38,40,41,43,45,47,49,51,53,55-tetracosaene 7,7,27,27-tetraoxide, formed from -dichlorodiphenyl sulfone and bisphenol-A has been determined by single-crystal techniques and the structure of the unsolvated dimer refined using X-ray powder diffraction data. The molecular conformations are similar and phenyl-phenyl stacking interactions are apparently important in determining the molecular conformation in the solid state. . (1) cyclo-[ .: molecular weight 963.2, monoclinic, (2), (3), (2) Å, , (7) Å. (2), cyclo-[( : molecular weight 885.06, monoclinic, , (15), (18), (12) Å, , (5) Å.