Nomenclature of Geometrical Isomers

Nomenclature of Geometrical Isomers is done using cis-trans or E-Z system, based on the relative positions or priority of substituents.

Nomenclature of Geometrical Isomers

There are three main systems used to name geometrical isomers:

1. Cis-Trans Nomenclature

   • When it is used: Simple alkenes or cycloalkanes with identical groups
   • Basis of naming: Relative positioning of identical groups

2. E-Z Nomenclature

   • When it is used: Alkenes with different groups on each double-bonded carbon
   • Basis of naming: Priority based on atomic number (Cahn-Ingold-Prelog rules)

3. Syn-Anti Nomenclature

   • When it is used: Oximes, imines, enols, etc.
   • Basis of naming: Position of specific groups (e.g., OH, H) relative to each other

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