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About: Cryptochirality     Goto   Sponge   NotDistinct   Permalink

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In stereochemistry, cryptochirality is a special case of chirality in which a molecule is chiral but its specific rotation is non-measurable. The underlying reason for the lack of rotation is the specific electronic properties of the molecule. The term was introduced by Kurt Mislow in 1977. For example, the alkane 5-ethyl-5-propylundecane found in certain species of Phaseolus vulgaris is chiral at its central quaternary carbon, but neither enantiomeric form has any observable optical rotation: