CIP Priority and E/Z (Sequence Rules) (Assign priorities at each sp² carbon using atomic number; Z if high-priority groups same)
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Assign priorities at each sp² carbon using atomic number; Z if high-priority groups same side (cis-like), E if opposite — per CIP rules
What each symbol means
| Symbol | What it stands for |
|---|---|
| Z/E | Zusammen/Entgegen based on priority groups, not methyl counting |
When to use this
Double bond must have two different groups on each carbon for stereoisomerism.