|Chapter 7 : Stereochemistry|
The Cahn-Ingold-Prelog R/S rules are used for naming enantiomers and diastereomers
NB: The term chirality has superceded the term stereogenic or chiral center.
|The chirality center is easy to spot, and the four attached groups are I (purple), Br (maroon), F(green) and H (white), listed in priority order, highest to to lowest.
Rotate the JSMOL image on the left so the you are looking along the C-H bond and the H is away from you, then determine the direction of high to low priority.
It decreases clockwise (I to Br to F), so this is the R enantiomer.
|© Dr. Ian Hunt, Department of Chemistry|