Question

What is the IUPAC name of the following compound? \[ \text{HC}= \text{C} - \text{C} = \text{CH} \]

• A. 3,3-diethynylpenta-1,4-diene
• B. 3,3-diethynylpenta-1,4-dyne
• C. 3,3-diethynyl-3,3-diethyln-methane
• D. 3-ethyl-3-ethylpent-1-en-4-yne

Hint:

When naming organic compounds, identify the longest chain with the maximum number of double/triple bonds, and position the substituents accordingly.

Answer 1

The Correct Option is A

To find the IUPAC name of this compound, first observe the longest chain that contains both the triple bonds. The structure contains two triple bonds and is substituted with ethynyl groups at positions 3 and 3 of the carbon chain. The correct name is 3,3-diethynylpenta-1,4-diene. Thus, the correct answer is Option (A).