An atom holding a set of
ligands in a spatial arrangement which is not superposable on its mirror image. A
chirality centre is thus a generalized extension of the concept of the
asymmetric carbon atom to central atoms of any element, for example
N+abcd,
Pabc
as well as
Cabcd.
Source:
PAC, 1996, 68, 2193
(Basic terminology of stereochemistry (IUPAC Recommendations 1996))
on page 2203