Which of the following relation is correct for reactivity? CH3COO−orCH3CH2S−withCH3Iinethanol
A
CH3CH2S−>CH3COO−
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B
CH3CH2S−<CH3COO−
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C
CH3CH2S−=CH3COO−
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D
Cannot be compared
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Solution
The correct option is ACH3CH2S−>CH3COO− Higher electronegativity means lower nucleophilicity because the role of a nucleophile is to share e−. If the atom is more electronegative it is less willing to share its e−. In the polar protic solvent like ethanol CH3COO− participating in hydrogen bonding, the nucleophile is considerably less reactive than CH3CH2S−.