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Arrange the following species in order o...

Arrange the following species in order of decreasing nucleophilicity in a polar protic solvent.
(I). `CH_(3)CH_(2)CH_(2)O^(-)`,
(II). `CH_(3)CH_(2)CH_(2)S^(-)`
(III). `CH_(3)-CH_(2)-overset(O)overset(||)(C)-overline(O)`

Text Solution

Verified by Experts

The nucleophilicity of the anions is related to strenlths of the corresponding acids formed by accepting `H^(+)` from the protic solvent. Greater the strenlth of the acid, lesser is the nucleophilicity of the anion.

The relative order of nucleophilicity is (II)gt(I)gt(III).
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