Question

The IUPAC name of

• A. 3-Methyl-1-Pentyne
• B. 3-Methyl-4-Pentyne
• C. 2-Ethyl-2-Propyne
• D. 3-Methyl-5-Pentyne

Hint:

When naming organic compounds, identify the longest chain with the functional group (here, the triple bond) and number it to give the functional group the lowest possible number. Add side chains as substituents.

Answer 1

The Correct Option is A

The given compound has the structure where the main chain is a pentyne (5 carbon atoms with a triple bond between carbons 1 and 2), and the side chain is a methyl group at carbon 3. Therefore, the IUPAC name is 3-Methyl-1-Pentyne.