Hydrocarbons 2 Question 64
68. Give the structure of the major organic products obtained from 3-ethyl-2-pentene under each of the following reaction conditions :
(1996)
(a) $\mathrm{HBr}$ in the presence of peroxide
(b) $\mathrm{Br}{2} / \mathrm{H}{2} \mathrm{O}$
(c) $\mathrm{Hg}(\mathrm{OAc}){2} / \mathrm{H}{2} \mathrm{O}, \mathrm{NaBH}_{4}$
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Solution:
- $\mathrm{CH}{3} \mathrm{CH}=\underset{3 \text {-ethyl-2-pentene }}{\mathrm{C}}-\mathrm{CH}{2} \mathrm{CH}{3} \underset{\text { peroxide }}{\mathrm{HBr}} \mathrm{CH}{3}-\underset{\mathrm{Br}}{\mathrm{CH}}-\mathrm{CH}-\mathrm{C}{2} \mathrm{H}{5}$
