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Which of the following is the strongest nucleophile?A. `OH^(-)`B. `CH_(3)OH`C. `CH_(3)S^(-)`D. `CH_(3)O^(-)`

Answer» Correct Answer - C
If nucleophilic atoms are the same, then nucleophilicity is directly related to basicity:
`CH_(3)O^(-) gt OH^(-)gt CH_(3)OH`
as `CH_(3)OH` is the weakest acid while `CH_(3)overset(+)OH_(2)` is the strongest acid. If nucleophilic atoms belong to the same group then nucleophilicity is inversely related to basicity:
`CH_(3)S^(-) gt CH_(3)O^(-)`
as `CH_(3)SH` is a stronger acid than `CH_(3)OH`.


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