Halogenation fullerene derivatives

Prior to the development of tether-directed functionalization methods, regioisomerically pure higher adducts of C50 usually were obtained by additions of transition metal complexes [31-33] or radical halogenations [34, 35]. These reactions either occur under thermodynamic control or lead to the precipitation of the least soluble derivative. Iso-merically pure higher adducts of C o sometimes are also readily isolated out of more complex product mixtures [36]. Tether-directed remote functionalization of CgQ allows the construction of fullerene derivatives with addition patterns that are difficult to obtain by thermodynamically or kinetically controlled reactions with free untethered reagents. Since the description of the first such reaction in 1994 [7], which is the subject of Section 7.3.1, an increasing variety of such regioselective functionalization protocols have... 

Another route to the preparation of Cgo derivatives involves the reaction of a halogen derivative of diethylmalonate in the presence of a strong base with fullerenes, which results in a... 

TABLE 3. Isomer ratio (%) in the mononitration of halogen derivatives of benzene and C o fullerene solubility in these derivatives [34] ... 

TABLE 4. C6o fullerene solubility in halogen derivatives of benzene... 

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