Which of the following is the best nucleophile in __________? Which of the follo

Question

Which of the following is the best nucleophile in __________?

Which of the following is the best nucleophile in water? CH3S Submit Answer Tries 0/1 Which of the following is the best nucleophile in ether? OH H20+ MeOH H2O Submit Answer Tries 0/1 Which of the following is the best nucleophile in ether? CH30H CH30 CH3S CH3Se Submit Answer Tries 0/1 Which of the following is the best nucleophile in methanol? Br- IT Submit Answer Tries 0/1 Which of the following is the best nucleophile in ethanol? IF Submit Answer Tries 0/1

Explanation / Answer

1. for first question.

Iodine with negative charge having more nucleophilicity because it has a bigger size . due to which the solvation effect become less.

2.nucleophile means searching of nucleus so here only OH(-) having negative charge. so the most nucleophicity will be of OH(-)ions.

3.here we have three negatively charged spicies . in which all are attached with methyl group. but here solvent is polar aprotic. so here CH3O(-) will show more nucleophilicity.

4.methanol is also a alocholic solution and is considered as a polar protic solvent . so here solvation effect comes into the picture and once again I(-) will show its nucleophilicity more .

5. ethanol is also a polar protic solvent . same reason as given above therefore here also I(-) have greater nucleophilicity.

solvent effect - polar solvent attracts the small size molecule. because incomparison between F(-),Cl(-),Br(-) due to small size F(-) is smaller in size (having high charge density). polar solvent surrounds it and attracts . so it cannot donate its electron pair.

ex- water attracts the F(-) all over the side and a slightly between the hydrogen and flourine is formed . due to this flourine can not donate its electron pair easily to required molecule.

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