Answer
Verified
411.3k+ views
Hint: To answer this question, we should recall the Carbylamine reaction. It involves a primary amine, chloroform and alcoholic KOH.
Complete step by step answer:
As we can already guess that this is the Carbylamine reaction. Carbylamine reaction or Hoffmann isocyanide is the synthesis reaction of an isocyanide involving a primary amine, chloroform, and base. This reaction involves a dichlorocarbene intermediate which is very essential for this conversion. But the carbylamine reaction cannot be used to synthesize isocyanides from secondary and tertiary amines since the intermediate does not form.
Let us now get a general idea of the reaction mechanism which will make it easier for us to understand what actually takes place during the Hofmann isocyanide synthesis.
The first step of this reaction is the dehydrohalogenation which means removal of hydrogen and halide from the given substrate of chloroform to produce dichlorocarbene intermediate. This dichlorocarbene intermediate is very reactive in nature. The electrophilic dichlorocarbene then attacks the nucleophilic nitrogen of the primary amine used as reactant. The elimination of the hydrochloric acid ultimately causes the formation of an isonitrile.
The reaction is illustrated below:
We can see that the only primary amine given to us as an option is aniline.
Hence, the correct answer is Option (B) Aniline.
Note:
We can now make an educated guess about the utility of this reaction. Since we can see that the carbylamine reaction produces results only for primary amines, this can be used as a chemical test to confirm the presence of the presence of primary amines. It is generally characterized by a very foul smell.
Complete step by step answer:
As we can already guess that this is the Carbylamine reaction. Carbylamine reaction or Hoffmann isocyanide is the synthesis reaction of an isocyanide involving a primary amine, chloroform, and base. This reaction involves a dichlorocarbene intermediate which is very essential for this conversion. But the carbylamine reaction cannot be used to synthesize isocyanides from secondary and tertiary amines since the intermediate does not form.
Let us now get a general idea of the reaction mechanism which will make it easier for us to understand what actually takes place during the Hofmann isocyanide synthesis.
The first step of this reaction is the dehydrohalogenation which means removal of hydrogen and halide from the given substrate of chloroform to produce dichlorocarbene intermediate. This dichlorocarbene intermediate is very reactive in nature. The electrophilic dichlorocarbene then attacks the nucleophilic nitrogen of the primary amine used as reactant. The elimination of the hydrochloric acid ultimately causes the formation of an isonitrile.
The reaction is illustrated below:
We can see that the only primary amine given to us as an option is aniline.
Hence, the correct answer is Option (B) Aniline.
Note:
We can now make an educated guess about the utility of this reaction. Since we can see that the carbylamine reaction produces results only for primary amines, this can be used as a chemical test to confirm the presence of the presence of primary amines. It is generally characterized by a very foul smell.
Recently Updated Pages
Basicity of sulphurous acid and sulphuric acid are
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
What is the stopping potential when the metal with class 12 physics JEE_Main
The momentum of a photon is 2 times 10 16gm cmsec Its class 12 physics JEE_Main
How do you arrange NH4 + BF3 H2O C2H2 in increasing class 11 chemistry CBSE
Is H mCT and q mCT the same thing If so which is more class 11 chemistry CBSE
Trending doubts
Draw a diagram showing the external features of fish class 11 biology CBSE
Select the word that is correctly spelled a Twelveth class 10 english CBSE
Difference Between Plant Cell and Animal Cell
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
What is BLO What is the full form of BLO class 8 social science CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
Change the following sentences into negative and interrogative class 10 english CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths