Question

The IUPAC name of \(\mathrm{CH_3-C(Br)(CH_3)_2-CH_3}\) is:

• A. Tertiary butyl chloride
• B. Secondary butyl chloride
• C. 2-bromo-2-methyl propane
• D. 2,2-dimethyl-1-bromoethane

Hint:

Always choose the longest carbon chain as the parent chain, then assign substituents with the lowest possible numbers.

Answer 1

The Correct Option is C

Step 1: Identify the parent chain.
The longest chain contains 3 carbons \(\Rightarrow\) propane is the parent chain.
Step 2: Locate substituents.
- A bromo group is attached at carbon 2.
- A methyl group is also attached at carbon 2.
Step 3: Apply IUPAC rules.
The name becomes \(\mathrm{2-bromo-2-methylpropane}\).
Step 4: Check incorrect options.
(A) Tertiary butyl chloride: Wrong halogen.
(B) Secondary butyl chloride: Incorrect structure.
(C) 2-bromo-2-methyl propane: Correct IUPAC name.
(D) 2,2-dimethyl-1-bromoethane: Incorrect naming.
Step 5: Conclusion.
Thus, the correct name is (C) 2-bromo-2-methyl propane.