Isolation and characterisation of bis(oxahomo)fullerene derivatives of C60F18

From the products of the reaction of [60]fullerene with K2PtF6 under vacuum at 465 degreesC we have isolated seven isomers of C60F18O2, and characteri zed them by EI mass spectrometry, IR and F-19 NMR spectroscopy (both 1 D an d 2 D). Comparison with data for mono-oxides and the observed lack of conne ctivity between the fluorines attached to carbons adjacent to oxygen, indic ate that these compounds are diethers with oxygen inserted between fluorina ted carbons. Structures proposed on the basis of the NMR spectra and semiem pirical calculations are found to be consistent with HPLC retention times.