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Effect of cage structure on xenon chemical shift. a shows the chemical shift of xenon in cryptophane-A. b shows the chemical shift of xenon in a similar cage, cryptophane-E, a 30-ppm difference from that in cryptophane-A. The line widths for cryptophanes A and E are broadened by the exchange of xenon between the cage and tetrachloroethane, the organic solvent used.
