Question

How many tertiary carbon atoms and primary carbon atoms respectively are present in 2-iodo-3,3-dimethylpentane?

• A. 2, 4
• B. 0, 4
• C. 2, 3
• D. 1, 3

Hint:

Primary carbon is attached to only one other carbon atom.

Answer 1

The Correct Option is B

Step 1: Writing the structure.
2-iodo-3,3-dimethylpentane has a pentane backbone with two methyl groups at C-3 and iodine at C-2.

Step 2: Identifying tertiary carbons.
No carbon atom is attached to three other carbon atoms, so tertiary carbon atoms = 0.

Step 3: Identifying primary carbons.
The terminal carbons and methyl substituents contribute four primary carbon atoms.

Step 4: Conclusion.
Hence, the correct answer is 0 tertiary and 4 primary carbon atoms.