Answer
(3E)-4-ethyl-2,3-dimethylhept-3-ene
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: 4-ethyl-2,3-dimethyl
- Parent: hept
- Unsaturations: 3-en
- Functional group: e
2. Identify the double bonds and stereocenters.
- Double bond - Carbon 3.
3. Identify their configurations:
- The double bond on carbon 3:
On the left: 1 Propyl (Top) and 1 Ethyl(Bottom).
- (Top) gets priority.
On the right: 1 Methyl (Top) and 1 Isopropyl(Bottom)
- (Bottom) gets priority.
Since different directions got priority, the configuration is: "E": (3E)
4. Put all the parts together:
(3E)-4-ethyl-2,3-dimethylhept-3-ene
