NEETChemistryGeneral Organic Chemistry
What is the correct IUPAC name for the compound given below? HC C - CH(CH₂CH₃) - CH₂ - CH(CH₃) - CH₂ - CH₃
Options
- A5-Ethyl-3-methylhept-6-yne
- B5-Methyl-3-ethylhept-1-yne
- C3-Ethyl-5-methylhept-1-yne
- D5-Ethyl-3-methylhept-1-yne
Correct answer
C. 3-Ethyl-5-methylhept-1-yne
Step-by-step solution
The principal functional group is the alkyne (triple bond), so the longest carbon chain containing the triple bond is selected as the parent chain. Here, the longest chain has 7 carbon atoms, making it a heptane derivative. Numbering must be done from the end closer to the triple bond to give it the lowest possible locant. Thus, numbering starts from left to right, placing the triple bond at C1. The substituents are an ethyl group at C3 and a methyl group at C5. According to IUPAC rules, substituents are cited in a