E–Z Nomenclature (Geometrical Isomerism)
E–Z nomenclature is a system used to describe geometrical isomers of alkenes when the simple cis–trans system cannot be applied. It is based on the Cahn–Ingold–Prelog (CIP) priority rules. The letters E and Z are derived from German words: This system is used when the double-bonded carbon atoms have different substituent groups, making cis–trans naming … Read more