Which of the following pairs of IUPAC names and corresponding common/trivial names represent the SAM — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

Isobutane ($CH_3CH(CH_3)CH_3$) is 2-methylpropane. Neopentane ($C(CH_3)_4$) is 2,2-dimethylpropane. Isooctane is the trivial name specifically assigned to 2,2,4-trimethylpentane. "Neobutane" is a fictitious name (4 carbons can only form n-butane or isobutane).