Question

A compound with a molecular formula of C₆H₁₄ has two tertiary carbons. Its IUPAC name is:

• A. n-hexane
• B. 2-methylpentane
• C. 2,3-dimethylbutane
• D. 2,2-dimethylbutane

Answer 1

The Correct Option is C

Step 1: Identify the Molecular Formula and Its Implications 

The given compound has six carbon atoms and fourteen hydrogen atoms (\( C_6H_{14} \)), indicating that it is an alkane.

Step 2: Understand Tertiary Carbons

A tertiary carbon is a carbon atom that is bonded to three other carbon atoms. The compound must contain two such tertiary carbons to meet the requirement.

Step 3: Analyze the Options

• 2-Methylpentane: Has only one tertiary carbon.
• 2,3-Dimethylbutane: Has two tertiary carbons at C2 and C3.
• 2,2-Dimethylbutane: Has only one tertiary carbon.
• n-Hexane: Contains no tertiary carbons.

Step 4: Conclusion

The correct answer is:

2,3-Dimethylbutane, as it has two tertiary carbons.