The crystal structure and absolute configuration of the title complex (–)[Cr(pd)3] has been determined from single-crystal X-ray data and refined by least-squares methods to R 0.037. The red-purple crystal has unit-cell dimensions a= 12.720(3), b= 12.643(4)c= 11.443(3)Å, β= 101.08(4)°, space group P21, and Z= 4. The (–) isomer has the Δ configuration and a nearly regular CrO6 co-ordination octahedron. The packing modes of the molecules in the active and in the racemic[Cr(pd)3] crystal are compared and the enantiomeric discrimination in favour of the latter structure is analyzed.
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Kuroda et al. (1979) studied this question.