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Standard XII

Chemistry

Stereochemistry of the Products in SN1 and SN2 Reactions

Which of the ...

Question

Which of the following statement(s) is/are true for the following reaction?

(1) It involves a carbocation intermediate
(2) Rearrangement is due to $S_{N} 1$ mechanism.
(3) It proceeds via $S_{N} 2$ pathway.
(4) It involves neighbouring group participation.

(1), (2)

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(2), (4)

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(1), (2), (4)

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(3), (4)

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Solution

The correct option is D (3), (4)

From the mechanism: reaction goes through $S_{N} 2$ pathway involving neighbouring group participation.

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Similar questions

C H_{3} - O - C H_{2} - C l a q .^{⊖} O H - ---- \to Δ C H_{3} - O - C H_{2} - O H

Which information below regarding this reaction is applicable?

Q. Alkyl halides and alcohols easily undergo nucleophilic substitution either through

S_{N} 1

S_{N} 2

mechanism. The relative case of these two processes depends upon the nature of the substrate (alkyl group) as well as leaving group, nature of nucleophile and also upon the nature of the solvent.

S_{N} 1

mechanism involves the formation of carbocation as intermediate while

S_{N} 2

mechanism involves the formation of a transition pentavalent state.

S_{N} 1

is the main mechanism in

3^{0}

alkyl halides and alcohols, while

S_{N} 2

mechanism is the path adopted by most of the

1^{o}

alkly halides;

2^{o}

alkyl halides may follow

S_{N} 1

as well as

S_{N} 2

What happens when

1^{o} R O H

react with

H X

Q. The following transformation involves a carbocation rearrangement. The carbocation is generated by protonation of the hydroxyl group, followed by the loss of water. Which bond has to migrate in the carbocation to yield the product indicated (after the deprotonation) ?

Q. Which of the following can undergoes nucleophilic substitution by its neighbouring group participation?

Q. Which of the following phrases are not correctly associated with

S_{N} 1

reaction?

(1) Rearrangement is possible

(2) Rate is affected by the polarity of solvent

(3) The strength of the nucleophile is important in determining the rate

(4) The reactivity series is tertiary

>

secondary

>

primary

(5) Proceeds with complete inversion of configuration

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Which of the following statement(s) is/are true for the following reaction? (1) It involves a carbocation intermediate (2) Rearrangement is due to SN1 mechanism. (3) It proceeds via SN2 pathway. (4) It involves neighbouring group participation.

The correct option is D (3), (4) From the mechanism: reaction goes through SN2 pathway involving neighbouring group participation.

Which of the following statement(s) is/are true for the following reaction?

(1) It involves a carbocation intermediate
(2) Rearrangement is due to $S_{N} 1$ mechanism.
(3) It proceeds via $S_{N} 2$ pathway.
(4) It involves neighbouring group participation.

The correct option is D (3), (4)

From the mechanism: reaction goes through $S_{N} 2$ pathway involving neighbouring group participation.