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Chapter 11: Q.11-50d (page 350)

Question:What products would you expect from the reaction of 1-bromopropane with each of the following?

(d) NaCN

Short Answer

Expert verified

Answer:

CH3CH2CH2Br+NaCN→CH3CH2CH2CN+NaBrSubstitutionreaction

Step by step solution

01

SN2 reaction

It is a nucleophilic substitution reaction in which an old bond is broken, and a new bond is formed. Both processes occur simultaneously. Hence, it is a single-step reaction.

Two reacting species are involved in the rate-determining steps.

02

 Step2: Reaction of CH3CH2CH2Br+NaCN

It is a substitution reaction in which C-Br is broken and the C-CN bond is formed in a single-step process which means the bromide ion is substituted by the cyanide ion. Hence, it is a substitution reaction, and bromide and cyanide are nucleophiles’ so-called nucleophilic substitution reactions.

CH3CH2CH2Br+NaCN→CH3CH2CH2CN+NaBrSubstitutionreaction

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Which reaction in each of the following pairs would you expect to be faster?

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