Question

Which of the following is the correct IUPAC name for the compound with the molecular formula \( C_5H_{12} \) that contains a branched chain with a methyl group attached to the second carbon of a butane chain?

• A. 2-Methylbutane
• B. 3-Methylbutane
• C. 2-Ethylpropane
• D. Pentane

Hint:

When naming branched alkanes, always choose the longest continuous chain as the parent chain and number it such that the substituent groups get the lowest possible numbers.