One of the qualitative test you can perform to confirm the presence of the halog
ID: 909498 • Letter: O
Question
One of the qualitative test you can perform to confirm the presence of the halogen group on the product is the reaction with alcoholic silver nitrate. The book gives the following reaction (Chapter 25) to describe what happens in this chemical test:
ethanol
While the precipitate, AgBr, indeed forms in the presence of bromobutane, the other product described in this reaction is not likely to form.
a. Explain why the organic product does not form.
b. Suggest what might be the actual product that is formed in this chemical test other than the precipitate. Briefly, explain your choice of product.
Explanation / Answer
The actual reaction that takes place when butyl bromide raects with alcoholic silver nitrate is
CH3(CH2)2CH2-Br + H2O + AgNO3 ——> CH3CH2CH2 CH2-OH + AgBr + HNO3
part a:
alkyl halides undergo nucleophilic substitution reactions. Here bromide nucleophile is replaced by a strong nucleophile like OH- . here we have taken alcoholic AgNO3 so major product is Alcohol .
if we have taken aqeous AgNO3 then butyl nitrite will be formed.
partb :
in addition to precipitate the other product is butyl alcohol
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