The low-temperature study of D- and DL-camphoric anhydride.
The low-temperature crystal stuctures of D- and DL-camphoric anhydride, C(10)H(14)O(3), have been determined by X-ray diffraction methods. Although the two enantiomers crystallize in different space groups, the cell volumes and densities are essentially the same. The six-membered rings deviate significantly from planarity, both exhibiting half-boat conformations. The dihedral angle between the six- and five-membered rings is 80.3 (1) degrees in both cases. The main difference in the molecular stuctures can be described by two torsion angles associated with the H atoms of the methyl substituents. The packing of the racemic and chiral structures are essentially the same.
Kumaradhas
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Department of Chemistry, Centre for Molecular Design, University of the Witwatersrand, Private Bag 3, Wits 2050, Johannesburg, South Africa.
Levendis
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Koritsanszky
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