NMR CHEMICAL-SHIFTS OF XE-129 DISSOLVED IN VARIOUS OXYGEN AND NITROGEN SUBSTITUTED STRAIGHT-CHAIN ALIPHATIC-COMPOUNDS

Xenon-129 NMR spectra have been measured for dilute solutions of Xe-12 9 dissolved in a series of n-alcohols and primary n-alkyl amines, as w ell as ethylene glycol and water. The chemical shifts recorded for Xe- 129 in the alcohols and amines are found to be linearly related to sol vent composition expressed in terms of the individual methyl and methy lene groups as well as the nitrogen and oxygen bearing functional grou ps making up these compounds. This behavior is consistent with a simpl e model which considers the van der Waals contribution to the chemical shift of Xe-129 to result from pair interactions between a dissolved Xe atom and the individual methyl, methylene, and functional groups fr om which the solvent molecules are derived. The Xe-129 chemical shifts caused by the -CH2-, -NH2, and -OH groups are found to be quite simil ar in magnitude, each being approximately twice that of a -CH3 group.