Hexagonal or tetragonal packing of columnar stacks in crystals and liquid crystals has been observed for a series of molecules possessing a fullerene apex and an aromatic cone that are connected with a Si-C connection. The columnar stacking of the new shuttlecock molecules is constitutionally stable but conformationally flexible due to the large cavity created on the top of the fullerene molecule.
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Matsuo et al. (2003) studied this question.
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