https://doi.org/10.1351/goldbook.C01093
@S05983@ @O04281@ or @C01497@ (or hetero-analogues) which differ in the positions of atoms (or groups) relative to a reference plane: in the cis[email protected]@ the atoms are on the same side, in the @C01092@[email protected]@ they are on opposite sides.
C01093.png