The correct nucleophilicity order for SN 2 reaction in protic solvents is (a) CH3 S^->C6 H5 S^

step 1 The correct nucleophilicity order for the essential in the polar solvent. Polar Procletics solve

The correct nucleophilicity order for SN 2 reaction in...

The correct nucleophilicity order for $\mathrm{S}_{\mathrm{N}} 2$ reaction in protic solvents is (a) $\mathrm{CH}_{3} \mathrm{~S}^{-}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~S}^{-}>\mathrm{I}^{-}>\mathrm{CN}^{-}>\mathrm{CH}_{3} \mathrm{O}^{-}>\mathrm{OH}^{-}$ (b) $\mathrm{CH}_{3} \mathrm{~S}^{-}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~S}^{-}>\mathrm{CN}^{-}>\mathrm{I}^{-}>\mathrm{CH}_{3} \mathrm{O}^{-}>\mathrm{OH}^{-}$ (c) $\mathrm{CN}^{-}>\mathrm{CH}_{3} \mathrm{~S}^{-}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~S}^{-}>\mathrm{OH}^{-}>\mathrm{CH}_{3} \mathrm{O}^{-}>\mathrm{I}^{-}$ (d) $\mathrm{OH}^{-}>\mathrm{CH}_{3} \mathrm{O}^{-}>\mathrm{CN}^{-}>\mathrm{CH}_{3} \mathrm{~S}^{-}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~S}^{-}>\mathrm{I}^{-}$

The correct nucleophilicity order for $\mathrm{S}_{\mathrm{N}} 2$ reaction in protic solvents is
(a) $\mathrm{CH}_{3} \mathrm{~S}^{-}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~S}^{-}>\mathrm{I}^{-}>\mathrm{CN}^{-}>\mathrm{CH}_{3} \mathrm{O}^{-}>\mathrm{OH}^{-}$
(b) $\mathrm{CH}_{3} \mathrm{~S}^{-}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~S}^{-}>\mathrm{CN}^{-}>\mathrm{I}^{-}>\mathrm{CH}_{3} \mathrm{O}^{-}>\mathrm{OH}^{-}$
(c) $\mathrm{CN}^{-}>\mathrm{CH}_{3} \mathrm{~S}^{-}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~S}^{-}>\mathrm{OH}^{-}>\mathrm{CH}_{3} \mathrm{O}^{-}>\mathrm{I}^{-}$
(d) $\mathrm{OH}^{-}>\mathrm{CH}_{3} \mathrm{O}^{-}>\mathrm{CN}^{-}>\mathrm{CH}_{3} \mathrm{~S}^{-}>\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{~S}^{-}>\mathrm{I}^{-}$

Key Concepts

Polarizability

Polarizability refers to the ease with which the electron cloud of a molecule or ion can be distorted. In the context of nucleophilicity, more polarizable species can better accommodate the transition state during an SN2 reaction, often making them more reactive in protic solvents as they experience reduced solvation compared to less polarizable, smaller nucleophiles.

SN2 Reaction Mechanism

The SN2 reaction is a bimolecular nucleophilic substitution mechanism characterized by a single concerted step where the nucleophile attacks the electrophile from the opposite side of the leaving group. This causes the simultaneous formation of a new bond and the breaking of the old bond, with steric hindrance and solvent effects playing significant roles in the reaction rate.

Nucleophilicity

Nucleophilicity is a measure of a chemical species' ability to donate an electron pair to an electrophile, which is crucial in SN2 mechanisms. It is influenced by factors such as charge, electronegativity, steric hindrance, and the electronic environment, determining how effectively a nucleophile can attack the electrophilic center.

Protic Solvent Effects

Protic solvents, which are capable of hydrogen bonding, play a significant role in modulating nucleophilicity by stabilizing charged species through solvation. In these solvents, small, highly charged, and basic nucleophiles are often heavily solvated, reducing their reactivity relative to larger, more polarizable nucleophiles that are less effectively solvated.

Please give Ace some feedback