Provide systematic name for given alkene.

• A. 3-ethyl-5-hexene
• B. 4-isopropyl-1-hexene
• C. 4-ethyl-1-hexene
• D. 4-isopropyl-2-hexene

Answer: (C)

Verified step by step guidance

1. Identify the longest carbon chain that contains the double bond. In the given structure, the longest chain is a hexane (6 carbon atoms) with a double bond, making it an alkene.
2. Number the carbon chain starting from the end nearest to the double bond to give the lowest possible number to the double bond. In this case, the double bond starts at the first carbon, so it is 1-hexene.
3. Identify and name the substituents attached to the main chain. In the structure, there is an ethyl group attached to the fourth carbon.
4. Combine the names of the substituents with the main chain name, placing the substituents in alphabetical order and using their position numbers. The ethyl group is at position 4, so it is named as 4-ethyl.
5. Write the full systematic name by combining the substituent name with the main chain name, resulting in 4-ethyl-1-hexene.