Question

What is the correct nomenclature of the following compound?

• A. 2-chloropent-4-yne
• B. 4-chloropent-2-yne
• C. 1-chloropent-4-yne
• D. 4-chloropent-1-yne

Answer 1

The correct option is D 4-chloropent-1-yne

The given compound contains Alkyne(suffix : yne) and a halogen, alkyne is given priority over Cl according to IUPAC so the Cl is made as prefix and counting starts from the carbon from where alkyne gets less numbering.