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  • Need explanation for: The decreasing order of nucleophilicity among the nucleophiles is

The decreasing order of nucleophilicity among the nucleophiles is

        

  • Option 1)

    1, 2, 3, 4

  • Option 2)

    4, 3, 2, 1

  • Option 3)

    2, 3, 1, 4

  • Option 4)

    3, 2, 1, 4.

 

Answers (2)

best_answer

As we learnt ,

 

Negatively charged Nucleophile - - wherein

OH^{-},CH_{3}^{-},NH_{2}^{-},R-O^{-}

 

 CN- is the strongest nucleophile among the options as the -ive charge is on N .

In ,     , the -ive charge is stabilized by resonance . Hence, it is a weaker nucleophile.

In ,   , the -ive charge is more stabilized by being in resonance with phenyl ring and     group.

So it is weakest nucleophile.

 


Option 1)

1, 2, 3, 4

Option 2)

4, 3, 2, 1

Option 3)

2, 3, 1, 4

Option 4)

3, 2, 1, 4.

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