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प्रश्न
Account for the following:
Gabriel phthalimide synthesis is not preferred for preparing aromatic primary amines.
उत्तर
Gabriel phthalimide synthesis not prefered for preparing aromatic primary amines because amine formation involves nucleophilic substituion 2 ( ) SN of alkyl halides by the anion formed by the phthalimide. But aryl halides do not undergo nucleophilic substitution with the anion formed by the phthalimide. As nucleophilic substitution reactions are very difficult in aryl halides.
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संबंधित प्रश्न
Identify the product 'A' in the following reaction.
\[\ce{Aniline ->[(CH3CO)2O][Pyridine] A}\]
What is the molar mass of the amine formed when acetamide undergoes Hofmann bromamide degradation?
How will you bring out the following conversion?
Match the reactions given in Column I with the statements given in Column II.
| Column I | Column II | ||
| (i) | Ammonolysis | (a) | Amine with lesser number of carbon atoms |
| (ii) | Gabriel phthalimide synthesis | (b) | Detection test for primary amines. |
| (iii) | Hoffmann Bromamide reaction | (c) | Reaction of phthalimide with \[\ce{KOH}\] and \[\ce{R-X}\] |
| (iv) | Carbylamine reaction | (d) | Reaction of alkylhalides with \[\ce{NH3}\] |
Account for the following:
Aniline cannot be prepared by the ammonolysis of chlorobenzene under normal conditions.
Which of the following compound gives pink colour on reaction with phthalic anhydride in cone. H2SO4 followed by treatment with NaOH?
Which of the following would not be a good choice for reducing nitrobenzene to aniline?
Write a short note on the following:
Ammonolysis
Write a short note on Ammonolysis.
Write a short note on Ammonolysis.
