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Alkyl halides undergo nucleophilic subst...

Alkyl halides undergo nucleophilic substitution reactions in which halogen atom is replaced by other atom.
`RX + Nu:^(-) to Nu-R + X^(-)`
These reactions follow `S_(N)1` and `S_(N)2` type mechanism, in which `S_(N)1` takes place in two steps while `S_(N)2` takes place in single step. Due to their tendency to undergo substitution by a large number of nucleophiles, they form a variety of products.
In which of the following pairs, the first nucleophile is stronger?

A

`Cl^(-), I^(-)`

B

`CH_(3)OH, CH_(3)S^(-)`

C

`(CH_(3)CH_(2))_(2)NH, (CH_(3)CH_(2))_(3)N`

D

`(CH_(3))_(2)O, (CH_(3))_(3)N`

Text Solution

Verified by Experts

The correct Answer is:
C
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Alkyl halides undergo nucleophilic substitution reactions in which halogen atom is replaced by other atom. RX + Nu:^(-) to Nu-R + X^(-) These reactions follow S_(N)1 and S_(N)2 type mechanism, in which S_(N)1 takes place in two steps while S_(N)2 takes place in single step. Due to their tendency to undergo substitution by a large number of nucleophiles, they form a variety of products. In which of the following pairs, the first compound is better S_(N)2 substrate ?

Alkyl halides undergo nucleophilic substitution reactions in which halogen atom is replaced by other atom. RX + Nu:^(-) to Nu-R + X^(-) These reactions follow S_(N)1 and S_(N)2 type mechanism, in which S_(N)1 takes place in two steps while S_(N)2 takes place in single step. Due to their tendency to undergo substitution by a large number of nucleophiles, they form a variety of products. Which of the following has highest nucleophilicity?

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Alkyl halides undergo nucleophilic substitution reactions in which halogen atom is replaced by other atom. RX + Nu:^(-) to Nu-R + X^(-) These reactions follow S_(N)1 and S_(N)2 type mechanism, in which S_(N)1 takes place in two steps while S_(N)2 takes place in single step. Due to their tendency to undergo substitution by a large number of nucleophiles, they form a variety of products. In which of the following nucleophilic substitution reaction, the product formed is racemic mixture ?

Alkyl halides undergo nucleophilic substitution reactions in which halogen atom is replaced by other atom. RX + Nu:^(-) to Nu-R + X^(-) These reactions follow S_(N)1 and S_(N)2 type mechanism, in which S_(N)1 takes place in two steps while S_(N)2 takes place in single step. Due to their tendency to undergo substitution by a large number of nucleophiles, they form a variety of products. In which of the following nucleophilic substitution reaction, the product formed is racemic mixture ?

Alkyl halides undergo nucleophilic substitution reactions in which halogen atom is replaced by other atom. RX + Nu:^(-) to Nu-R + X^(-) These reactions follow S_(N)1 and S_(N)2 type mechanism, in which S_(N)1 takes place in two steps while S_(N)2 takes place in single step. Due to their tendency to undergo substitution by a large number of nucleophiles, they form a variety of products. Which of the following is least reactive towards S_(N)2 mechanism ?

Knowledge Check

  • Alkyl halides undergo nucleophilic substitution reactions in which halogen atom is replaced by other atom. RX + Nu:^(-) to Nu-R + X^(-) These reactions follow S_(N)1 and S_(N)2 type mechanism, in which S_(N)1 takes place in two steps while S_(N)2 takes place in single step. Due to their tendency to undergo substitution by a large number of nucleophiles, they form a variety of products. In which of the following pairs, the first compound is better S_(N)2 substrate ?

    A
    1-bromo-1-methyl cyclohexane, cyclohexyl bromide
    B
    1-iodo-2, 2-dimethyl propane, isopropyl iodide
    C
    2, 2,-dimethyl-1-chlorobutane, 2-chloro butane
    D
    isopropyl bromide, 2-bromobutane

  • Alkyl halides undergo nucleophilic substitution reactions in which halogen atom is replaced by other atom. RX + Nu:^(-) to Nu-R + X^(-) These reactions follow S_(N)1 and S_(N)2 type mechanism, in which S_(N)1 takes place in two steps while S_(N)2 takes place in single step. Due to their tendency to undergo substitution by a large number of nucleophiles, they form a variety of products. In which of the following pairs, the first compound is better S_(N)2 substrate ?

    A
    1-bromo-1-methyl cyclohexane, cyclohexyl bromide
    B
    1-iodo-2, 2-dimethyl propane, isopropyl iodide
    C
    2, 2,-dimethyl-1-chlorobutane, 2-chloro butane
    D
    isopropyl bromide, 2-bromobutane

  • Alkyl halides undergo nucleophilic substitution reactions in which halogen atom is replaced by other atom. RX + Nu:^(-) to Nu-R + X^(-) These reactions follow S_(N)1 and S_(N)2 type mechanism, in which S_(N)1 takes place in two steps while S_(N)2 takes place in single step. Due to their tendency to undergo substitution by a large number of nucleophiles, they form a variety of products. Which of the following has highest nucleophilicity?

    A
    `SH^(-)`
    B
    `H_(2)O`
    C
    `OH^(-)`
    D
    `F^(-)`