Question
The correct nucleophilicity order is
A.
$$CH_3^ - < NH_2^ - < H{O^ - } < {F^ - }$$
B.
$$CH_3^ - \simeq NH_2^ - > H{O^ - } \simeq {F^ - }$$
C.
$$CH_3^ - > NH_2^ - > H{O^ - } > {F^ - }$$
D.
$$NH_2^ - > {F^ - } > H{O^ - } > CH_3^ - $$
Answer :
$$CH_3^ - > NH_2^ - > H{O^ - } > {F^ - }$$
Solution :
Nucleophilicity increases with the decrease in electronegativity of the central atom.
Since electronegativity follows the order :
$$F > O > N > C;$$ nucleophilicity of the concerned group will follow the reverse order i.e., $$CH_3^ - > NH_2^ - > O{H^ - } > {F^ - }$$