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प्रश्न
Give the mechanism of the following reaction:
\[\ce{CH3CH2OH ->[H2SO4][413 K] CH3CH2-O-CH2CH3 + H2O}\]
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उत्तर
\[\ce{CH3CH2OH ->[H2SO4][413 K] \underset{Diethylether}{CH3CH2-O-CH2CH3} + H2O}\]
Mechanism: The formation of ether is a nucleophilic bimolecular reaction SN2 involving the attack of alcohol molecules on protonated alcohol as below:
(1) \[\ce{CH3CH2 - \underset{\bullet\bullet}{\overset{\bullet\bullet}{O}} - H + H+ -> CH3CH2 -^+ \underset{\bullet\bullet}{\overset{\ce{H}}{\overset{\bullet\bullet}{O}}} - H}\]
(2)
(3) \[\begin{array}{cc}
\ce{CH3CH2-\overset{+}{O}-CH2CH3 -> CH3CH2-O-CH2CH3 + H^+}\\
|\phantom{..................................}\\
\ce{H}\phantom{..................................}
\end{array}\]
\[\ce{H^+ + HSO^Θ_4 -> H2SO4}\]
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संबंधित प्रश्न
SN1 reactions are accompanied by racemization in optically active alkyl halides.
Given reasons: SN1 reactions are accompanied by racemization in optically active alkyl halides.
Which would undergo SN2 reaction faster in the following pair and why ?
CH3 – CH2 – Br and CH3 – CH2 – I
Which of the following is optically inactive?
Most reactive halide towards SN1 reaction is ____________.
Among the following, the dissociation constant is highest for:
The increasing order of nucleophilicity would be:
The correct order of increasing the reactivity of C–X bond towards nucleophile in following compounds.
(I)
(II)
(CH3)3CCl
(III)
(CH3)2CHCl
(IV)
Which of the following compounds will give a racemic mixture on nucleophilic substitution by OH ion?
1-Bromoethane, 1-Bromopropane, 1-Bromobutane, Bromobenzene
Why are aryl halides less reactive towards nucleophilic substitution reactions than alkyl halides?
