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प्रश्न
Write a short note on the following:
Gabriel phthalimide synthesis
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उत्तर
Gabriel synthesis is used for the preparation of primary amines. Phthalimide, on treatment with ethanolic potassium hydroxide, forms potassium salt of phthalimide, which on heating with alkyl halide followed by alkaline hydrolysis, produces the corresponding primary amine. Aromatic primary amines cannot be prepared by this method because aryl halides do not undergo nucleophilic substitution with the anion formed by phthalimide.
संबंधित प्रश्न
Give reasons for the following:
CH3NH2 is more basis than C6H5NH2.
Choose the most correct option.
The hybridisation of nitrogen in primary amine is ____________.
Isobutylamine is an example of ______.
Choose the most correct option.
Identify ‘B’ in the following reactions
\[\ce{CH3 - C ≡ N ->[Na/C2H5OH] A ->[NaNO2/dilHCl]B}\]
Write the number of moles of ethanoyl chloride required for complete acylation of N, N-dimethylaniline.
How are amines classified depending on the functional group? Give one example of each class of amines.
The product formed by the reaction an aldehyde with a primary amine ____________.
Which of the following amines does not undergo acetylation?
Write a short note on the following.
Schotten-Baumann reaction
How will you distinguish between primary secondary and tertiary aliphatic amines?
Account for the following.
Gabriel phthalimide synthesis is preferred for synthesising primary amines.
Account for the following.
Ethylamine is soluble in water whereas aniline is not.
Arrange the following:
In increasing order of solubility in water:
C6H5NH2, (C2H5)2NH, C2H5NH2
Arrange the following.
In increasing order of boiling point C6H5OH, (CH3)2NH, C2H5NH2.
How will you prepare propan-1-amine from 1-nitropropane?
How will you convert diethylamine into N-nitrosodiethylamine?
The following amine can be classified as (C2H5)2NH:
The following amine can be classified as:
Arrange the following in the increasing order of their basic strength:
C2H5NH2, C6H5NH2, (C2H5)2NH
The amine formed from an amide by mean of bromine and alkali has how many number of carbon atoms?
Classify the following amine as primary, secondary or tertiary:
Which among the following is the strongest Bronsted base?
Among the following, which is the strongest base?
Arrange the increasing order of solubility in water.
\[\ce{C2H5Cl, C2H5NH2, C2H5OH}\]
Write short notes on the following
Ammonolysis
Write short note on the following.
Ammonolysis
Account for the following:
Aniline does not undergo Friedel-Crafts reaction.
Write a short note on the following.
Ammonolysis
