Which of the following compounds contain exactly four primary () carbon atoms? — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

A primary carbon is attached to only one other carbon atom. Neopentane ($C(CH_3)_4$) has 4. 2,2-dimethylbutane ($CH_3-C(CH_3)_2-CH_2-CH_3$) has 4 terminal methyls. 2,3-dimethylbutane ($CH_3-CH(CH_3)-CH(CH_3)-CH_3$) has 4 terminal methyls. Isobutane has only 3.