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प्रश्न
Predict all the alkenes that would be formed by dehydrohalogenation of the following halide with sodium ethoxide in ethanol and identify the major alkene:
2, 2, 3-Trimethyl-3-bromopentane
उत्तर
There are two different types of β-hydrogen atoms present in the halide. Hence, in the dehydrohalogenation reaction, it will form two alkenes: 3, 4, 4-trimethylpent-2-ene and 2-ethyl-3, 3-dimethylbut-1-ene. The first alkene is more stable because it is more substituted (according to Saytzeff rule). Hence, it is the major product.
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संबंधित प्रश्न
Identify the product ‘D’ in the following sequence of reactions:
\[\ce{H3C - CH2 - CH2 - Cl \underset{KOH}{\overset{Alc}{->}} 'B' \overset{HBr}{->} 'C' \underset{Elther}{\overset{Na}{->}}'D'}\]
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1-Bromo-1-methylcyclohexane
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\[\ce{(CH3)3CBr + KOH ->[ethanol][heat]}\]
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(I)
\[\ce{\underset{\text{(II)}}{CH3 - CH2 - Br}}\]
- Identify the type of halides.
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- Which of these compounds will undergo aqueous alkaline hydrolysis readily? Write the reaction in support of your answer.
'A' is:
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\[\ce{CH3 C(CI) (C2H5)CH2CH3 }\]