JEE Mains · Chemistry · STD 12 - 6. Haloalkanes and Haloarenes
The major product obtained in the following reaction is :
- A \(( \pm ){C_6}{H_5}CH({O^t }Bu)C{H_2}{C_6}{H_5}\)
- B \(C_6H_5CH=CHC_6H_5\)
- C \(( + ){C_6}{H_5}CH({O^t }Bu)C{H_2}{C_6}{H_5}\)
- D \(( - ){C_6}{H_5}CH({O^t }Bu)C{H_2}{C_6}{H_5}\)
Answer & Solution
Correct Answer
(B) \(C_6H_5CH=CHC_6H_5\)
Step-by-step Solution
Detailed explanation
Carrying out dehydrohalogenation with a bulky base such as potassium tert-butoxide ( \(t\) -\(BuOK\) ) in \(1,2\) -diphenyl1-bromoethane \((t-\mathrm{BuOH})\) favors the formation of the alkene via \(E_2\) mechanism. The reaction involved is
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