मराठी
महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Answer the following Explain Gabriel phthalimide synthesis.

Advertisements
Advertisements

प्रश्न

Answer the following

Explain Gabriel phthalimide synthesis.

थोडक्यात उत्तर
Advertisements

उत्तर

This method is used for the synthesis of primary amine. It involves the following three stages.

i. Formation of the potassium salt of phthalimide from phthalimide on reaction with alcoholic potassium hydroxide.

ii. Formation of N-alkyl phthalimide from the potassium salt by reaction with an alkyl halide.

iii. Alkaline hydrolysis of N-alkyl phthalimide to form the corresponding primary amine.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 13: Amines - Exercises [पृष्ठ २९७]

APPEARS IN

बालभारती Chemistry [English] Standard 12 Maharashtra State Board
पाठ 13 Amines
Exercises | Q 3.06 | पृष्ठ २९७

संबंधित प्रश्‍न

How is ethyl amine prepared from methyl iodide?


Identify the compounds 'A' and 'B' in the following equation:


How do you convert the following: C6H5CONH2 to C6H5NH2


How do you convert the following: Ethanenitrile to ethanamine


Give the structures of A, B and C in the following reactions :


Give the structures of A, B and C in the following reactions :


Accomplish the following conversion:

Benzyl chloride to 2-phenylethanamine


Accomplish the following conversion:

Benzamide to toluene


Give the structure of A, B and C in the following reaction:

\[\ce{CH3CH2Br ->[KCN] A ->[LiAlH4] B ->[HNO2][0^\circ C] C}\]


Give the structures of A, B and C in the following reaction:

\[\ce{CH3COOH ->[NH3][\Delta] A ->[NaOBr] B ->[NaNO2/HCl] C}\]


Give a plausible explanation for the following:

Why are amines less acidic than alcohols of comparable molecular masses?


Explain the mechanism of action of hydroiodic acid on 3-methylbutan-2-ol.


Identify 'A' and 'B' in the following reaction and rewrite the complete reaction :


Give the structures of A, B and C in the following reactions :


Account for the following:
Gabriel phthalimide synthesis is not preferred for preparing aromatic primary amines.


Write reactions to prepare ethanamine from Acetonitrile.


Name the process of breaking C-X bond by ammonia in preparation of amines.


Write reactions to bring about the following conversions.

Acetamide to Ethylamine


Explain Hoffmann’s exhaustive alkylation with suitable reactions.


Identify compound 'B' in following series of reactions?

\[\ce{Acetonitrile ->[Na/alcohol] A ->[NaNO2/dil.HCI] B}\]


Alkyl cyanides on reduction by sodium and ethanol give primary amines. This reaction is called as ____________.


Identify the product obtained, when benzamide is treated with bromine and aqueous sodium hydroxide.


What is the molar mass of the amine formed when acetamide undergoes Hofmann bromamide degradation?


Identify 'A' and 'B' in the following conversions.

\[\ce{CH3 - I ->[Alc. KCN][\Delta] A ->[Na/C2H5OH] B}\]


In aqueous phase the order of basic strength of alkylamine is ______.


Which of the following reagents is used in Mendius reduction reaction of alkyl cyanide?


Which of the following reagents is used in Hofmann's elimination reaction of amines?


Nitro compounds are reduced by iron scrap and hydrochloric acid to yield one of the following compounds:


For producing amines, the reaction of nitro compounds with iron scrap is preferred because:


In order to prepare a 1° amine from an alkyl halide with simultaneous addition of one \[\ce{CH2}\] group in the carbon chain, the reagent used as source of nitrogen is ______.


Hoffmann Bromamide Degradation reaction is shown by ______.


Which of the following amines can be prepared by Gabriel synthesis.

(i) Isobutyl amine

(ii) 2-Phenylethylamine

(iii) N-methylbenzylamine

(iv) Aniline


What is the product when \[\ce{C6H5CH2NH2}\] reacts with \[\ce{HNO2}\]?


How will you carry out the following conversion?


How will you carry out the following conversions?


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 \[\ce{NH3}\]

Assertion: Only a small amount of \[\ce{HCl}\] is required in the reduction of nitro compounds with iron scrap and \[\ce{HCl}\] in the presence of steam.

Reason: \[\ce{FeCl2}\] formed gets hydrolysed to release \[\ce{HCl}\] during the reaction.


Describe Gabriel's phthalimide synthesis. (Give reaction)


Account for the following:

Aniline cannot be prepared by the ammonolysis of chlorobenzene under normal conditions.


Which of the following reactions will not give a primary amine?


Reduction of nitro alkanes yields which compound?


Acetamide and ethyl amide can be distinguished by reacting with.


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 amines can be prepared by Gabriel phthalimide reaction?


Which of the following statement(s) is/are incorrect in case of Hofmann bromamide degradation?


What is the IUPAC name of \[\ce{(CH3)2 - N - CH3}\]?


Identify the product ‘C’ in the following reaction.

\[\ce{Aniline ->[(CH3CH)2O][Pyridine] A ->[Br2][CH3COOH] B ->[H^+ or OH^-] C}\]


Amides can be converted into amines by the reaction named ______.


Write short note on the following:

Ammonolysis


Write a short note on the following:

Ammonolysis


Write short note on the following:

Ammonolysis


Assertion: Amimonolysis of alkyl halides involves the reaction between alkyl halides and alcoholic ammonia.

Reason: Ammonolysis of alkyl halides produces secondary amines only.


Write short notes on the following:

Ammonolysis 


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×