Question

The common name of 1-bromo -3, 3-dimethyl butane is

• A. tert-pentyl bromide
• B. isobutyl bromide
• C. neo hexyl bromide
• D. n-hexyl bromide

Hint:

In organic chemistry, "neo" indicates a branched structure, which is the case for 1-bromo-3,3-dimethylbutane.

Answer 1

The Correct Option is C

Step 1: Understanding the structure.
1-Bromo-3,3-dimethylbutane has a common name derived from the structure. The "neo" prefix indicates the presence of a branched chain. This compound has a branching at the second carbon, making it neo hexyl bromide.
Step 2: Analyzing the options.
(A) tert-pentyl bromide: Incorrect. Tert-pentyl bromide is a different compound with a tertiary butyl group.
(B) isobutyl bromide: Incorrect. Isobutyl bromide has a different structure than 1-bromo-3,3-dimethylbutane.
(C) neo hexyl bromide: Correct. This is the common name for 1-bromo-3,3-dimethylbutane based on its branched structure.
(D) n-hexyl bromide: Incorrect. N-hexyl bromide refers to a straight-chain hexyl group, which does not apply here.
Step 3: Conclusion.
The correct answer is (C) neo hexyl bromide.