The chirality command reports the R/S chirality of four-substituent atoms in atom-spec, typically sp3-hybridized carbons (atom type C3) although other elements may occasionally qualify. The chiral centers are reported as R or S in the Log. If verbose true is given, the nonchiral four-substituent atoms in atom-spec will also be listed and reported as not chiral (default false, only chiral centers reported).
The current implementation includes only the simpler Cahn-Ingold-Prelog rules and will fail in complicated cases such as when one center's assignment depends on the chiralities of other centers in the molecule. Further, bond orders are guessed from atom types.
To invert a chiral center, see build invert. See also: Build Structure, measurements