Hydrocarbons Question 228
During free radical bromination of isobutene, an alkene is produced as byproduct via disproportionation of the intermediate alkyl free radical. What is this alkene-
Options:
A) 1-butene
B) 2-butene
C) 2-methylpropene
D) Both [b] and [c]
Show Answer
Answer:
Correct Answer: C
Solution:
As shown in the above mechanism, 1-butene and 2-butene cannot be formed by this free radical.
release of 1 hydrogen radical gives 2-methylpropene as a disproportionated product.

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