Acta Cryst. (2006). B62, 86-93 [ doi:10.1107/S0108768105037766 ]
halogen interactions in chlorotrimethylsilane polymorphsAbstract: The structures of in situ pressure-frozen chlorotrimethylsilane crystals, (CH3)3SiCl, have been determined at 0.23, 0.30 and 0.58 GPa. The molecular arrangements in the low-temperature and high-pressure phases are two-dimensionally isostructural, but different in the third perpendicular direction. Consequently, a striking similarity exists between the unit-cell dimensions of these polymorphs. The absence of short ClCl contacts, both in the low-temperature or pressure-frozen phases of (CH3)3SiCl, has been rationalized in terms of the favoured packing patterns and comparable energies of halogenhalogen interactions and other van der Waals forces.
Keywords: high pressure; halogenhalogen interactions; polymorphism; in situ crystallization; pressure freezing.
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| Structure factor file (CIF format) (9.0 kbytes) |
| Structure factor file (CIF format) (10.7 kbytes) |
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