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(A) S(N^(2)) reactioin takes place in si...

(A) `S_(N^(2))` reactioin takes place in single step.
(R) `S_(N^(2))` reaction involves transition state intermediate.

A

If both (A) and (R) are correct and (R) is the correct explanation of (A).

B

If both (A) and (R) are correct but (R) is not the correct explanation of (A).

C

If (A) is correct but (R) is incorrect.

D

IF (A) is incorrect but (R) is correct.

Text Solution

Verified by Experts

The correct Answer is:
B
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Explore conceptually related problems

(A) S_(N^(2)) reaction takes place in single step. (R) S_(N^(2)) reaction involves the reactivity order of alkyl halides as 1^(@) gt 2^(@) gt 3^(@) halides.

rate of S_(N^(2)) reaction is:

Nuclephilic substitution reaction is given by those compounds which have nucleophilic groups as leaving groups. The weaker the basicity of a group of the substrate, the better is its leaving ability. In nucleophilic substitution reactions, the basicity of leaving group should be less than the incoming nucleophilic group. Nucleophilc substitution reaction at sp^(3) -hybridised carbon is either bimolecular (S_(N^(2))) or unimolecular (S_(N^(1))) . Bimolecular reaction takes place in single step, involving transition state intermediate. In S_(N^(2)) reaction is preferred if the compound has less steric hindrance. Unimolecular (S_(N^(2))) reaction involves two steps and carbonium ion intermediate. Optically active substrates give recemic mixture in these reactions. S_(N^(2)) reaction involves transition state intermediate, hence it is favoured in which of the following solvents?

Nuclephilic substitution reaction is given by those compounds which have nucleophilic groups as leaving groups. The weaker the basicity of a group of the substrate, the better is its leaving ability. In nucleophilic substitution reactions, the basicity of leaving group should be less than the incoming nucleophilic group. Nucleophilc substitution reaction at sp^(3) -hybridised carbon is either bimolecular (S_(N^(2))) or unimolecular (S_(N^(1))) . Bimolecular reaction takes place in single step, involving transition state intermediate. In S_(N^(2)) reaction is preferred if the compound has less steric hindrance. Unimolecular (S_(N^(2))) reaction involves two steps and carbonium ion intermediate. Optically active substrates give recemic mixture in these reactions. Which compound will give Walden inversion in S_(N^(2)) reaction?

Nuclephilic substitution reaction is given by those compounds which have nucleophilic groups as leaving groups. The weaker the basicity of a group of the substrate, the better is its leaving ability. In nucleophilic substitution reactions, the basicity of leaving group should be less than the incoming nucleophilic group. Nucleophilc substitution reaction at sp^(3) -hybridised carbon is either bimolecular (S_(N^(2))) or unimolecular (S_(N^(1))) . Bimolecular reaction takes place in single step, involving transition state intermediate. In S_(N^(2)) reaction is preferred if the compound has less steric hindrance. Unimolecular (S_(N^(2))) reaction involves two steps and carbonium ion intermediate. Optically active substrates give recemic mixture in these reactions. Which among the following will give S_(N^(1)) reaction?

Nuclephilic substitution reaction is given by those compounds which have nucleophilic groups as leaving groups. The weaker the basicity of a group of the substrate, the better is its leaving ability. In nucleophilic substitution reactions, the basicity of leaving group should be less than the incoming nucleophilic group. Nucleophilc substitution reaction at sp^(3) -hybridised carbon is either bimolecular (S_(N^(2))) or unimolecular (S_(N^(1))) . Bimolecular reaction takes place in single step, involving transition state intermediate. In S_(N^(2)) reaction is preferred if the compound has less steric hindrance. Unimolecular (S_(N^(2))) reaction involves two steps and carbonium ion intermediate. Optically active substrates give recemic mixture in these reactions. Which among the following will give enantiomeric pair on treatment with HOH?

Nuclephilic substitution reaction is given by those compounds which have nucleophilic groups as leaving groups. The weaker the basicity of a group of the substrate, the better is its leaving ability. In nucleophilic substitution reactions, the basicity of leaving group should be less than the incoming nucleophilic group. Nucleophilc substitution reaction at sp^(3) -hybridised carbon is either bimolecular (S_(N^(2))) or unimolecular (S_(N^(1))) . Bimolecular reaction takes place in single step, involving transition state intermediate. In S_(N^(2)) reaction is preferred if the compound has less steric hindrance. Unimolecular (S_(N^(2))) reaction involves two steps and carbonium ion intermediate. Optically active substrates give recemic mixture in these reactions. Select the correct statements among the following:

S_(N^(1))and S_(N^(2)) reactions are

Knowledge Check

  • S_(N^(2)) reaction are

    A
    stereoselective as well as atereopecific
    B
    stereoselective but not stereospecific
    C
    stereospecific but not stereoselective
    D
    Neither stereospecific nor stereoselective

  • (A) S_(N^(2)) reaction takes place in single step. (R) S_(N^(2)) reaction involves the reactivity order of alkyl halides as 1^(@) gt 2^(@) gt 3^(@) halides.

    A
    If both (A) and (R) are correct and (R) is the correct explanation of (A)
    B
    If both (A) and (R) are correct but (R) is not the correct explanation of (A)
    C
    If (A) is correct but (R) is incorrect.
    D
    If (A) is incorrect but (R) is correct.

  • rate of S_(N^(2)) reaction is:

    A
    `(B) gt(A)gt(C ) `
    B
    `(C ) gt(A)gt(B) `
    C
    `(A) gt(B)gt(C ) `
    D
    `(A) gt(C )gt(B ) `