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Standard XII

Chemistry

SN1 Reaction Mechanism

Reaction of ...

Question

Reaction of $C_{6} H_{5} C H_{2} B r$ with aqueous sodium hydroxide follows ___________.

S_{N} 1

mechanism

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S_{N} 2

mechanism

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Any of the above two depending upon the temperature of reaction

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Saytzeff rule

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Solution

The correct option is B $S_{N} 1$ mechanism
In aqueous media $S N^{1}$ mechanism follow.In this reaction stable carbocation get form as intermediate.

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Similar questions

Reaction of $C_{6} H_{5} C H_{2} B r$ with aqueous sodium hydroxide follows ........

(a) $S_{N} 1$ mechanism

(b) $S_{N} 2$ mechanism

(d) Saytzeff rule

Reaction of Benzyl Bromide with aqueous Sodium Hydroxide follows........... mechanism

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. Alcohols can be prepared by haloalkanes using hydroxide ion in aqueous media through

S_{N} 1

and

S_{N} 2

.
The

S_{N} 1

reaction is a two-step reaction. In the first step, the carbon-halogen bond breaks to generate a stable carbocation. In the second step, the nucleophile reacts rapidly with the carbocation. This reaction follows first order kinetics.
The

S_{N} 2

is a concerted reaction in which transition state is achieved where bond making and bond breaking occur simultaneously. This reaction follows second order kinetics.
Consider the following reaction sequence.

Which of the following statement is correct about the mechanism of this reaction?

Q. Predict the order of reactivity of the following compounds in

S_{N} 1

and

S_{N} 2

reactions :
The four isomeric bromobutanes

C_{6} H_{5} C H_{2} B r, C_{6} H_{5} C H (C_{6} H_{5}) B r, C_{6} H_{5} C H (C H_{3}) B r, C_{6} H_{5} C (C H_{3}) (C_{6} H_{5}) B r

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Reaction of C6H5CH2Br with aqueous sodium hydroxide follows ___________.

The correct option is B SN1 mechanismIn aqueous media SN1 mechanism follow.In this reaction stable carbocation get form as intermediate.

Reaction of $C_{6} H_{5} C H_{2} B r$ with aqueous sodium hydroxide follows ___________.

The correct option is B $S_{N} 1$ mechanism
In aqueous media $S N^{1}$ mechanism follow.In this reaction stable carbocation get form as intermediate.