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प्रश्न
Which compound in the following pair will react faster in SN2 reaction with OH−?
(CH3)3CCl or CH3Cl
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उत्तर
\[\begin{array}{cc}
\phantom{......}\ce{CH3}\\
\phantom{...}|\\
\ce{CH3 - C - Cl}\\
\phantom{...}|\\
\phantom{......}\ce{CH3}\\
\end{array}\] or CH3, Cl
The SN2 mechanism involves attack by the nucleophile at the carbon bearing the leaving group. But, in the case of (CH3)3CCl, the attack of the nucleophile at the carbon atom is hindered because of the presence of bulky substituents on that carbon atom bearing the leaving group. On the other hand, there are no bulky substituents on the carbon atom bearing the leaving group in CH3Cl. Hence, CH3Cl reacts faster than (CH3)3CCl in SN2 reaction with OH−.
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संबंधित प्रश्न
Which would undergo SN2 reaction faster in the following pair and why ?
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CH3CH2CH2CH2Br or \[\begin{array}{cc}
\ce{CH3CH2CHCH3}\\
\phantom{.....}|\\
\phantom{.......}\ce{Br}\
\end{array}\]
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\[\ce{CH3CH2Br + KCN ->[aq{.} ethanol]}\]
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Given reasons: SN1 reactions are accompanied by racemization in optically active alkyl halides.
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silver acetate
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- CH3Br or CH3
- CH3Cl, (CH3)3CCl
Which of the following is optically inactive?
Identify the end product (C) in the following sequence:
\[\ce{C2H5OH ->[SOCl2][Pyridine] A ->[KCN {(alc.)}] B ->[2H2O/H^+] C}\]
Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?
Which of the following compound will undergo racemisation when reacts with aq. KOH?
(i)
(ii)
CH3CH2CH2Cl
(iii)
\[\begin{array}{cc}
\ce{CH3}\phantom{..}\\
|\phantom{....}\\
\ce{CH3-CH-CH2Cl}
\end{array}\]
(iv)
\[\begin{array}{cc}
\phantom{..}\ce{H}\\
\phantom{..}|\\
\ce{CH3-C-Cl}\\
\phantom{..}|\\
\phantom{.....}\ce{C2H5}
\end{array}\]
Among the following compounds I - IV, which one forms a yellow precipitate on reacting sequentially with (i) NaOH (ii) dil. HNO3 (iii) AgNO3?
 |
 |
 |
 |
| I | II | III | IV |
The number of chiral carbons present in the molecule given below is ______.
Assertion (A) : Nucleophilic substitution of iodoethane is easier than chloroethane.
Reason (R) : Bond enthalpy of C-I bond is less than that of C-Cl bond.
Retention of configuration is observed in ______.
Inversion of configuration occurs in ______.
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Which of the following reactions is an example of nucleophilic substitution reaction?
