A) \[{{C}_{2}}{{H}_{5}}SH\]
B) \[C{{H}_{3}}CO{{O}^{-}}\]
C) \[C{{H}_{3}}N{{H}_{2}}\]
D) \[NCCH_{2}^{-}\]
Correct Answer: A
Solution :
Nucleophiles are those substances which can donate a pair of electrons. These can be neutral or negative. The nucleophilic power depends on the tendency of species to donate electrons. This is more, when an electron pushing group (+I group) is present. Among the alkyl groups, those having higher number of C-atoms will push more, hence ethyl > methyl.
CH5 + CH2 (-I)
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