Lacking all symmetry elements (other than the trivial one of a one-fold axis of symmetry),
i.e. belonging to the symmetry point group.
The term has been used loosely (and incorrectly) to describe the absence of a rotation–reflection
axis (alternating axis) in a molecule, i.e. as meaning chiral
, and this usage persists in the traditional terms asymmetric carbon atom
, asymmetric synthesis
, asymmetric induction
PAC, 1996, 68, 2193
(Basic terminology of stereochemistry (IUPAC Recommendations 1996))
on page 2199
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook