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प्रश्न
Which compound in the following pair will react faster in SN2 reaction with OH−?
CH3Br or CH3I
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उत्तर
In the SN2 mechanism, the reactivity of halides for the same alkyl group increases in the order. This happens because as the size increases, the halide ion becomes a better leaving group.
R−F << R−Cl < R−Br < R−I
Therefore, CH3I will react faster than CH3Br in SN2 reactions with OH−.
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संबंधित प्रश्न
Write the structures of A, B and C in the following:

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Which of the following is a primary halide?
The order of reactivity of the given haloalkanes towards nucleophile is:
Which among MeX, RCH2X, R2CHX and R3CX is most reactive towards SN2 reaction?
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Which of the following is a chiral compound?
Which of the following compounds will give a racemic mixture on nucleophilic substitution by OH ion?
1-Bromoethane, 1-Bromopropane, 1-Bromobutane, Bromobenzene
Complete the following analogy:
Same molecular formula but different structures: A : : Non superimposable mirror images: B
Which of the following statements are correct about this reaction?

(i) The given reaction follows SN2 mechanism.
(ii) (b) and (d) have opposite configuration.
(iii) (b) and (d) have same configuration.
(iv) The given reaction follows SN1 mechanism.
Which one of the following compounds is more reactive towards SN1 reaction?
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The product formed during SN1 reaction is a racemic mixture.
The number of chiral alcohol (s) with molecular formula C4H10O is ______.
In SN1 reactions, the correct order of reactivity for the following compounds:
CH3Cl, CH3CH2Cl, (CH3)2CHCl and (CH3)3CCl 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.
Which one of the following chlorohydrocarbons readily undergoes solvolysis?
Which of the following reactions is an example of nucleophilic substitution reaction?
