Question

IUPAC name of the following molecule is 

• A. 3-Bromo-3,5-dimethyl hexane
• B. 4-Bromo-2,4-dimethyl hexane
• C. 3-Bromo-2-isobutyl butane
• D. 4-Bromo-2-methyl-4-ethyl pentane

Hint:

Always choose the longest carbon chain as the parent. Number to give substituents the lowest possible set of locants, and list substituents alphabetically.

Answer 1

The Correct Option is B

Step 1: Identify the parent chain.
The longest continuous carbon chain has 6 carbons → base name: hexane.
Step 2: Locate substituents.
- A bromine atom is attached at carbon 3.
- Two methyl groups are attached at carbons 3 and 5.
Step 3: Number the chain correctly.
Numbering from the end nearest to the substituents gives the lowest locants: Bromo at C-3, methyl groups at C-3 and C-5.
Step 4: Write the name.
Combine substituents alphabetically: \[ \boxed{\text{3-Bromo-3,5-dimethylhexane}} \] Step 5: Conclusion.
Hence, the IUPAC name is 3-Bromo-3,5-dimethylhexane.