The 3He NMR spectra of a [60]fullerene cation and some arylated [60]fullerenes
Abstract
The 3He NMR spectra have been measured for the following compounds containing 3He within the fullerene cage: symmetrical C60Ph2, unsymmetrical C60Ph4, C60Cl6, C60Ph5Cl, C60(4-FC6H4)5Cl, and the carbocation derived from the latter by the addition of AlCl3. In general there is an increase in 3He shielding with increased number of addends, and a decrease in shielding, relative to the precursor, on forming the cation.