Answer
(2Z,4E)-hepta-2,4-diene
Work Step by Step
1. Name the compound by its substituents, parent, unsaturations and functional group:
** First identify the parental chain, and where you should start counting the carbons.
- Substituent: (none)
- Parent: hepta
- Unsaturations: 2,4-dien
- Functional group: e
2. Identify the double bonds and stereocenters.
- 2 double bonds, carbons 2 and 4.
3. Identify their configurations:
- Double bond on carbon 2:
- On the left: Hydrogen (Top), Carbon chain (Bottom).
Bottom gets priority.
- On the right: Hydrogen(Top), Methyl (Bottom).
Bottom gets priority.
- Therefore, its configuration is "Z": (2Z)
Double bond on carbon 4:
- On the left: Hydrogen (Top) and Ethyl (Bottom)
Bottom gets priority.
- On the right: Carbon chain (Top) and Hydrogen (Bottom)
Top gets priority.
Therefore, its configuration is "E". (4E)
4. Put all the parts together:
(2Z,4E)-hepta-2,4-diene
