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. This chain will determine the base name of the alkene. In this case, count the carbons in the longest chain including the double bond.
2. Number the carbon chain starting from the end nearest to the double bond to give the double bond the lowest possible number. This number will indicate the position of the double bond in the name.
3. Identify and name any alkyl substituents (branches) attached to the main chain. Determine their positions by the carbon number they are attached to on the main chain.
4. Combine the substituent names and positions with the base name of the alkene. Use hyphens to separate numbers and names, and commas to separate multiple numbers. The double bond position is indicated by a number before the base name ending in '-ene'.
5. Write the full systematic name by placing the substituents in alphabetical order, followed by the position and name of the double bond, and then the base alkene name.