The potential of organofluoro compounds in materials chemistry is discussed in a paper by R. Berger and co-workers (Chem. Soc. Rev., 2011, 40, 3496). One group of compounds discussed is the fluorinated fullerenes. Give an equation for the reaction of the most commonly used fluorinated fullerene with an organic species to form [18]trannulene and sketch the product. The use of fluorine in pharmaceuticals is also described in the paper. Summarize the reasons why fluorine finds wide application in pharmaceutical compounds.