As a final result, we can obtain an - or an -enantiomer, depending on which side the nucleophile attacks. When they are equally likely, a racemic mixture results.

In the illustration of phase 1, the white spheres represent hydrogen atoms, the black spheres represent carbon atoms and the red sphere represents an ethyl group. Rotation cannot occur about a double bond, but as it turns into a single bond, rotation becomes possible, and the rotation angle control becomes active.

Phase 2 shows the nucleophilic attack, Using the "enantiomer" control it is possible to choose, as final product, the - or -enantiomer. Using the "chiral center viewpoint" checkbox will show the priority rules for the attached group on the chiral center and determine the sense of rotation. A center with a clockwise rotation is an or rectus center, while a center with a counterclockwise rotation is an or sinister center. The blue arrow indicates the direction of observation, which can be positioned in the chiral center viewpoint. The numbers above the attached groups represent priorities according to the CIP convention.

By selecting "CIP convention," you can show the two-dimensional projection of -enantiomers according to the classic convention, with the less significant substituent at the top.