Which of the following alkyl halides will undergo SN1 reaction most readily?
(i) (CH3)3C−F
(ii) (CH3)3C −Cl
(iii) (CH3)3C −Br
(iv) (CH3)3C −I
Which of the following alkyl halides will undergo SN1 reaction most readily?
(i) (CH3)3C−F
(ii) (CH3)3C −Cl
(iii) (CH3)3C −Br
(iv) (CH3)3C −I
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1 Answer
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This is a multiple choice answer as classified in NCERT Exemplar
The Correct Answer is Option (iv).
SN1 reactions occur mostly in polar protic solvents such as H2O and follow first-order kinetics. This indicates that the reaction rate is solely determined by one reactant. Because of the great stability of the generated carbocation, this reaction favours tertiary alkyl halides. When a molecule is polarised in water, it generates a carbocation as well as a halide ion. The halides' reactivity is R-I > R-Br > R-Cl > > R-F. As a result, (CH3)3C-I will be the most likely to undergo the reaction.
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