MHT CET · Chemistry · Hydrocarbons
Which of the following is formed when propene is heated with bromine at high temperature?
- A 1, 2-Dibromopropane
- B 1-Bromopropane
- C 2-Bromopropene
- D 3-Bromopropene
Answer & Solution
Correct Answer
(D) 3-Bromopropene
Step-by-step Solution
Detailed explanation
When alkenes are heated with \(\mathrm{Br}_2\) or \(\mathrm{Cl}_2\) at high temperature, hydrogen atom of allylic carbon is substituted with halogen atom giving allyl halide.
\(\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_3+\mathrm{Br}_2 \longrightarrow \mathrm{CH}_2=\) \(\mathrm{CH}-\mathrm{CH}_2 \mathrm{Br}+\mathrm{HBr}\)
\( \text { 3-Bromopropene}\)
\(\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_3+\mathrm{Br}_2 \longrightarrow \mathrm{CH}_2=\) \(\mathrm{CH}-\mathrm{CH}_2 \mathrm{Br}+\mathrm{HBr}\)
\( \text { 3-Bromopropene}\)
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