The crystal and molecular structure of R-(–)-1,1′-binaphthyl: the conformational isomerism and a comparison of the chiral with the racemic packing mode
- 1 January 1981
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 1,p. 167-170
- https://doi.org/10.1039/p29810000167
Abstract
The molecular and crystal structure of R-(–)-1,1′-binaphthyl has been determined from single-crystal X-ray data and refined by least-squares methods to R 0.045. The tetragonal crystal has unit-cell dimensions, a= 7.212 6(9), c= 27.510(5)Å, space group P41212, and Z= 4. The molecule has a transoid conformation in the active crystal with a dihedral angle of 103° between the mean molecular planes of the two naphthalene residues. The packing modes of the molecules in the active and in the more dense (9.4%) racemic crystal are compared in connection with the spontaneous optical resolution of 1,1′-binaphthyl by crystallisation at temperatures above 76°.Keywords
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