U.V. irradiation of a solution of 60fullerene in carbon tetrachloride saturated with chlorine gave a yellow solid, the negative ion FAB mass spectrum of which is consistent with the presence of C60Cl24When a solution of 60fullerene in CCl4was mixed with IF5, a yellow solid was deposited in the denser IF5layer. The negative ion FAB mass spectrum of this material indicated it to be C60C18F14This result provides the first confirmation that halogenation of Merenes is a radical process. Fluorination of C60Br8gave a range of fluorinated products, having a maximum fluorine content ofca. 36 fluorines per cage, and with either C60F18or its mono-oxide as major species. EI mass spectrometry of the products at various temperatures indicates that the more highly fluorinated fiiilerenes are either less stable to heat, or are more volatile.
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