According to IUPAC rules, if there is a choice in numbering due to identical locant sets for multiple bonds, the double bond is given preference over the triple bond. What is the correct name for ?

Question

According to IUPAC rules, if there is a choice in numbering due to identical locant sets for multiple bonds, the double bond is given preference over the triple bond. What is the correct name for $HC \equiv C - CH_2 - CH = CH_2$?

Prashant Kotian · Accepted Answer

Correct answer: A. Numbering from either end gives the locant set (1, 4) for the multiple bonds. In such tie situations, the double bond () receives the lower number. Therefore, numbering must start from the right end, making it Pent-1-en-4-yne.

💡 Solution & Explanation

Practice 22,000+ questions like this