COMEDK · Chemistry · 25. Haloalkanes and Haloarenes
Identify the product \([\mathrm{C}]\) formed at the end of the reaction below
1,1,2,2- Tetrabromopropane + 2 \(\mathrm{Zn}_{(\mathrm{S})}\) / Ethanol \(\rightarrow\) [B]
\([\mathrm{B}]\) + 2 moles of \(\mathrm{HBr} \rightarrow[\mathrm{C}]\)
- A 2, 2-Dibromopropane
- B 1, 1- Dibromopropane
- C 1,3-Dibromopropane
- D 1, 2-Dibromopropane
Answer & Solution
Correct Answer
(A) 2, 2-Dibromopropane
Step-by-step Solution
Detailed explanation
1,1,2,2-Tetrabromopropane \(+ 2Zn\) / Ethanol \(\to\) [B] \(CH_3 - CBr_2 - CHBr_2 + 2Zn \to CH_3 - C \equiv CH + 2ZnBr_2\) [B] is propyne. [B] \(+ 2HBr \to\) [C] (Markovnikov addition) \(CH_3 - C \equiv CH + 2HBr \to CH_3 - CBr_2 - CH_3\) [C] is 2, 2-Dibromopropane.
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