E-z Nomenclature
E-Z nomenclature is used for:
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About This Question
- Subject
- chemistry
- Chapter
- some basic principles of organic chemistry
- Topic
- e-z nomenclature
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Geometrical isomers with different groups
The E-Z system is the most comprehensive method for naming Geometrical Isomers (restricted rotation around C=C).
- It is used especially when all four groups attached to the double bond are different, making 'cis-trans' labels unhelpful.
- Based on CIP (Cahn-Ingold-Prelog) Priority Rules:
- Z (Zusammen): Higher priority groups on the same side.
- E (Entgegen): Higher priority groups on opposite sides.
This medium difficulty chemistry question is from the chapter some basic principles of organic chemistry, covering the topic of e-z nomenclature. It appeared in the 2025 exam.
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