Isolation and characterization by C-13 NMR spectroscopy of [84]fullerene minor isomers

The isolation of minor isomers of [84]fullerene (C-84) five in total, and t heir characterization by C-13 NMR spectroscopy, have been reported for the first time. The vis-near-infrared absorption spectra for these isomers are also reported. The C-13 NMR results indicate that the isolated C-84 isomers have, in order of decreasing abundance, C-2, C-s(a), C-s(b), D-2d(I), and D-2(II) molecular point group symmetry. In addition, we have found another C-84 minor isomer adjacent to C-s(b)-C-84. in the HPLC chromatogram.