The correct order of nucleophilicity among the following is :

I) $C H_{3} - O | | C - O^{-}$

II) $C H_{3} O^{-}$

III) $C N^{-}$

IV) $C H_{3} - C_{6} H_{4} - S O_{3}^{-}$

I > II > III > IV

No worries! We‘ve got your back. Try BYJU‘S free classes today!

IV > III > II > I

No worries! We‘ve got your back. Try BYJU‘S free classes today!

II > III > I > IV

No worries! We‘ve got your back. Try BYJU‘S free classes today!

III > II > I > IV

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is B III > II > I > IV
Higher the tendency to donate electrons or lone pair higher is the nucleophilicity.
Order of Nocleophilicity:
$C N^{-} > C H_{3} O^{-} > C H_{3} - O | | C - O^{-} > C H_{3} - C_{6} H_{4} - S O_{3}^{-}$
I. The tendency to donate loan pair in cynide ion is highest.
II. The inductive effect of methyl decreases the stability of the anion which results in increased nuceophilicity.
III. Negative charge on oxygen ion delocalize and thus decreases the nucleophilicity
IV. Delocalization of negative charge is more in IV than III. So, nucleophilicity is lowest in IV.
Hence, order is $I I I > I I > I > I V$ .

Suggest Corrections

Similar questions

+ I

- C H_{3}

- C D_{3}

- C T_{3}

- C H D_{2}

The priority order of the following substituent will be:

-OCH₃ ; -N(CH₃)₂ ; -CH₃ ; -H

I II III IV

P h O^{⊖}

C H_{3} S^{⊖}

⊖ O H

M e O^{⊖}

The decreasing nucleophilic order of the following compound is:

$(i) Θ C H_{3}$

$(i i) Θ N H_{2}$

$(i i i) Θ O H$

$(i v) Θ F$

The order of following alkynes in increasing number of acidic hydrogen is

Join BYJU'S Learning Program