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Chapter 11: Q 11-11-41 E-a (page 350)

Which compound in each of the following pairs will react faster in an SN2reaction with?

a) CH3Br or CH3I

Short Answer

Expert verified

CH3I

Step by step solution

01

SN2 reaction

It is a nucleophilic substitution reaction in which old bond breaks and new bond is formed both the process occur simultaneously. Hence, it’s a single step reaction.

The two reacting species are involved in the rate determining steps.

02

Nucleophile 

Nucleophilesare negatively charged ions or the neutral species having the lone pair of electrons which are ready for bonding.

03

Species react faster with OH+

If the species is a better leaving group then it react faster with the nucleophile

I is a better leaving group than Br due to its large size the bond of C-I is weak than C-Br bond so C-I bond get easily break and nucleophilic substitution takes place.

CH3I show fast reaction than CH3Br.

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Most popular questions from this chapter

Assign configuration to the following substance, and draw the structure of the product that would result from nucleophilic substitution reaction with (reddish brown =Br):

Question: Propose structures for compounds that fit the following descriptions:

(b) An organohalide that will not undergo nucleophilic substitution

What effect would you expect the following changes to have on the rate of the reaction of ethanol with 2-iodo-2-methyl butane?

(a) The concentration of the halide is tripled.

Question: 1-Chloro-1,2-diphenylethane can undergo E2 elimination to give either cis- or trans-1,2-diphenylethylene (stilbene). Draw Newman projections of the reactive conformations leading to both possible products, and suggest a reason why the trans alkene is the major product.

Which reactant in each of the following pairs is more nucleophilic? Explain.

a) NH2-or NH3
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