Fullerene dumbbell-shaped

The possibility of this binding mode was shown recently with the synthesis and structural analysis of the dumbbell-shaped bis-fullerene complexes of molybdenum and timgsten. The X-ray crystal structure proves the (71 -0 0)21 1 binding mode (Figure 7.9) [87]. 

The simplest dimer of a fullerene, C12o (7-II), can be synthesized in ca. 18% yield by vigorously vibrating a solid mixture of Qo and 20 molar equivalents of KCN powder 13 it has a dumbbell shape with a nearly square Q ring connecting the cages. 

Supramolecular chemistry of fullerenes can be used to control the interplay of fullerenes in the solid state, for then covalently linking the fullerenes under high pressure and temperature. The pioneeringwork for the synthesis of dumbbell-shaped C120 w ai done by Iwasa et al. This was followed by Sun and Reed preparing a linear polymer o/ covalently linked Cgo molecules. 

Finally, the complementary molecular affinity between a [60]fullerene component and a complementary host in organic solution has been used to construct supramolecular polymeric nano-arrays of [60]fullerene. Haino and coworkers have developed a supramolecular fullerene polymer through the iterative com-plexation of ditopic calix[5]arene 30 and dumbbell-shaped [60]fullerene 31 (Figure 9.33) [110]. Although pulsed-field gradient NMR studies indicate that the... 

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