In each of the following groups,which is the | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) For group $(I)$: $H_3C-S^-$ is a better nucleophile than alkoxides ($H_3C-O^-$ and $CH_3CH_2O^-$) because $S$ is larger and more polarizable than

Vedclass · Accepted Answer

$I-3; II-1; III-3$

Vedclass · Answer

(D) For group $(I)$: $H_3C-S^-$ is a better nucleophile than alkoxides ($H_3C-O^-$ and $CH_3CH_2O^-$) because $S$ is larger and more polarizable than $O$,and it is in a protic solvent $(CH_3OH)$. Thus,$(3)$ is the strongest.For group $(II)$: In a polar aprotic solvent like $DMF$,nucleophilicity follows basicity. $NH_2^-$ is a stronger base than $OH^-$ and $H_2O$,making it the strongest nucleophile. Thus,$(3)$ is the strongest.For group $(III)$: In a polar aprotic solvent like $DMSO$,nucleophilicity increases as steric hindrance decreases. $CH_3O^-$ $(3)$ is less sterically hindered than $(CH_3)_2CH-O^-$ $(1)$,making it a stronger nucleophile. Thus,$(3)$ is the strongest.Comparing the options provided,the correct sequence for the strongest nucleophiles is $I-3, II-3, III-3$. Since this specific combination is not explicitly listed in the options,we re-evaluate the provided choices. Given the structure of the question,option $(d)$ $I-3; II-1; III-3$ is likely a typo in the source,but based on chemical principles,the strongest nucleophiles are $(3)$,$(3)$,and $(3)$ respectively.

In each of the following groups,which is the strongest (best) nucleophile?
$(I)$ $(1)$ $H_3C-O^-$,$(2)$ $CH_3CH_2O^-$,$(3)$ $H_3C-S^-$ in $CH_3OH$
$(II)$ $(1)$ $OH^-$,$(2)$ $H_2O$,$(3)$ $NH_2^-$ in $DMF$
$(III)$ $(1)$ $(CH_3)_2CH-O^-$,$(2)$ $O^-$,$(3)$ $CH_3O^-$ in $DMSO$

Similar Questions

The attacking or reactive electrophilic species in the nitration of benzene with concentrated $HNO_3$ and $H_2SO_4$ is:

Which of the following is an electrophile?

Which is not an electrophile among the following?

Which of the following is not an electrophile?

What is the decreasing order of basic strength for the following species: $\mathop O\limits^\Theta H, \mathop N\limits^\Theta H_2, HC \equiv \mathop C\limits^\Theta, CH_3 - \mathop C\limits^\Theta H_2$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

In each of the following groups,which is the strongest (best) nucleophile?$(I)$ $(1)$ $H_3C-O^-$,$(2)$ $CH_3CH_2O^-$,$(3)$ $H_3C-S^-$ in $CH_3OH$$(II)$ $(1)$ $OH^-$,$(2)$ $H_2O$,$(3)$ $NH_2^-$ in $DMF$$(III)$ $(1)$ $(CH_3)_2CH-O^-$,$(2)$ $O^-$,$(3)$ $CH_3O^-$ in $DMSO$