See image — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

Correct option: \(\text{D}\). The correct choice is \(\text{D}\), 1, 3, 3, 3 - Tetramethyl ethyne. An acetylenic bond is a carbon-carbon triple bond, \( \mathrm{C\equiv C} \). Counting only such triple bonds in the given structure gives the value shown in the correct option. Recovered question text: 18. The IUPAC name of CH - CC - C(CH ) is : 3 3 3 (A) Methyl tertirarybutyl acetylene (B) t-Butyl propyne (C) 4, 4-Dimethyl-2-pentyne (D) 1, 3, 3, 3 - Tetramethyl ethyne