Properties of Higher Fullerenes

The chiral C76 as a pure substance also crystalUzes in a face-centered cubic form. Both enantiomers are evenly distributed throughout the crystal, and each C7is-molecule rotates freely at its lattice position. In contrast to Cgo and C70, lowering the temperature does not induce a phase transition into a less symmetric structure. The molecules rather seem to sit at their lattice positions in an unordered fashion, only with their rotation ceased. 

For even higher fullerenes like C, usually several isomers crystallize simultaneously, rendering the structural determination of distinct variants hard to perform. X-ray analysis of these compounds becomes possible only after chromatographic separation. A disorder of individual molecules is observed in the higher fullerenes as well. 

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Given the efficient spiral algorithm for generation of isomer lists, many problems in structure and properties of higher fullerenes have been attacked. It is particularly important to have complete lists because it has turned out that possession of a closed... 

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