Question

2-Methyl butane on reacting with bromine in the presence of sunlight gives mainly:

• A. 1-Bromo-3-methylbutane
• B. 1-Bromo-2-methylbutane
• C. 2-Bromo-3-methylbutane
• D. 2-Bromo-2-methylbutane

Answer 1

Answer: (D)

2-Bromo-2-methylbutane

D. 2-Bromo-2-methyl butane-22%
The bromination has 4 products in terms of substitution of hydrogen atom at same rate.
2-Bromo-2-methyl butane(22%/1=22%)
2-Bromo-3-methyl butane(33%/2=16.5%)
1-Bromo-2-methyl butane(30%/6=5%)
1-Bromo-3-methyl butane(15%/3=5%)