The correct order of S_{N}1 reaction rate for | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The rate of $S_{N}1$ reaction depends on the stability of the carbocation intermediate formed after the departure of the leaving group $(Cl^-)$.$(

Vedclass · Accepted Answer

$i > iii > ii$

Vedclass · Answer

(C) The rate of $S_{N}1$ reaction depends on the stability of the carbocation intermediate formed after the departure of the leaving group $(Cl^-)$.$(i)$ Forms an allylic carbocation,which is resonance stabilized.(ii) Forms a secondary $(2^{\circ})$ cyclohexyl carbocation.(iii) Forms a tertiary $(3^{\circ})$ carbocation.Comparing the stability of these carbocations:$1$. The allylic carbocation (from $i$) is highly stable due to resonance.$2$. The tertiary carbocation (from $iii$) is stable due to inductive effect and hyperconjugation.$3$. The secondary carbocation (from $ii$) is the least stable among the three.Thus,the order of stability of carbocations is $i > iii > ii$. Consequently,the order of $S_{N}1$ reactivity is $i > iii > ii$. However,based on standard textbook problems of this type,the resonance-stabilized allylic carbocation is significantly more reactive. Given the options,$i > iii > ii$ is the correct chemical trend.

The correct order of $S_{N}1$ reaction rate for the given compounds is:

Similar Questions

Describe the color,odor,and density of haloalkanes.

Which among the following will have the highest density?

An isomer of $C_3H_6Cl_2$ gives acetone on heating with aqueous $KOH$. This isomer is .......

Determine the number of chiral products (including stereoisomers) formed upon $E_2$ elimination of the given substrate with $alc. KOH$.

Which alkyl halide undergoes the ${S}_{N}1$ reaction most rapidly?

Vedclass Test Series

Exam Paper Generator

Online Exam Module