English

Answer the following Identify A and B in the following reactions. CX6HX5CHX2Br→KCNalco⋅A→Na/ethanolB⋅

Advertisements
Advertisements

Question

Answer the following

Identify A and B in the following reactions.

\[\ce{C6H5CH2Br->[alco.][KCN]A ->[Na/ethanol]B.}\]

One Line Answer
Advertisements

Solution

\[\ce{\underset{\text{Benzyl bromide}}{C6H5 - CH2 - Br} ->[alcoholic KCN]\underset{\text{Phenylacetonitrile} (A)}{C6H5 - CH2 - C ≡ N} ->[Na/ethanol]\underset{\text{2-Phenylethylamine} (B)}{C6H5 - CH2 - CH2 - NH2}}\]

shaalaa.com
  Is there an error in this question or solution?
Chapter 13: Amines - Exercises [Page 297]

APPEARS IN

Balbharati Chemistry [English] Standard 12 Maharashtra State Board
Chapter 13 Amines
Exercises | Q 3.01 | Page 297

RELATED QUESTIONS

How is ethyl amine prepared from methyl iodide?


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


An aromatic compound 'A' of molecular formula C7H7ON undergoes a series of reactions as shown below. Write the structures of A, B, C, D and E in the following reactions :


Accomplish the following conversion:

Benzamide to toluene


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

\[\ce{CH3CH2I ->[NaCN] A ->[OH-][Partial hydrolysis] B ->[NaOH + Br2] C}\]


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

\[\ce{C6H5N2Cl ->[CuCN] A ->[H2O/H+] B ->[NH3][\Delta] C}\]


Why cannot aromatic primary amines be prepared by Gabriel phthalimide synthesis?


Write the reaction of aliphatic primary amine with nitrous acid.


Arrange the following in the increasing order of their pKvalues:

C6H5NH2, C2H5NH2, C6H5NHCH3


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 structures of compounds A and B in each of the following reactions:


Answer in one sentence.

Predict the product of the following reaction.

\[\ce{Nitrobenzene ->[Sn/conc.HCl]?}\]


Answer the following

Write a reaction to convert acetic acid into methylamine.


Answer the following

Explain Gabriel phthalimide synthesis.


Write reactions to prepare ethanamine from Acetonitrile.


Mendius reaction is used to convert _____________


Write reactions to bring about the following conversions.

Acetamide to methylamine


The end product C of the following reaction is

\[\ce{C2H5NH2 ->[HNO2] A ->[PCl5] B ->[NH3][Alcohol] C}\]


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


Identify the product obtained when benzyl chloride undergoes ammonolysis in presence of excess ammonia followed by the reaction with two moles of methyl iodide.


Identify the major product (B).


Which nitrogen containing compound amongst the following would undergo Mendius reduction to furnish primary amine \[\ce{(R - NH2)}\]?


Which of the following reactions is appropriate for converting benzamide to aniline?


Which of the following amines forms a clear solution when treated with benzene sulphonyl chloride and excess of potassium hydroxide?


Which of the following compounds is obtained when quaternary ammonium hydroxide is strongly heated?


Which of the following does NOT give carbylamine test?


Which of the following reactions does NOT yield an amine?


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


Quaternary ammonium salt is formed:


Given below are two statements labelled as Assertion (A) and Reason (R).

Assertion (A): Alkyl halides are insoluble in water.

Reason (R): Alkyl halides have halogen attached to sp3 hybrid carbon.

Select the most appropriate answer from the options given below:


Benzylamine may be alkylated as shown in the following equation:

\[\ce{C6H5CH2NH2 + R - X -> C6H5CH2NHR}\]

Which of the following alkylhalides is best suited for this reaction through SN1 mechanism?


Hoffmann Bromamide Degradation reaction is shown by ______.


Among the following amines, the strongest Brönsted base is:


Reduction of nitrobenzene by which of the following reagent gives aniline?

(i) \[\ce{Sn/HCl}\]

(ii) \[\ce{Fe/HCl}\]

(iii) \[\ce{H2 - Pd}\]

(iv) \[\ce{Sn/NH4OH}\]


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

(i) Isobutyl amine

(ii) 2-Phenylethylamine

(iii) N-methylbenzylamine

(iv) Aniline


Under which of the following reaction conditions, aniline gives p-nitro derivative as the major product?

(i) Acetyl chloride/pyridine followed by reaction with conc.\[\ce{H2SO4 }\] + conc. \[\ce{HNO3}\].

(ii) Acetic anyhdride/pyridine followed by conc.\[\ce{H2SO4}\] + conc.\[\ce{HNO3}\].

(iii) Dil. HCl followed by reaction with conc.\[\ce{H2SO4}\] + conc.\[\ce{HNO3}\].

(iv) Reaction with conc.\[\ce{HNO3}\] + conc.\[\ce{H2 SO4}\].


How will you carry out the following conversion?


How will you carry out the following conversions?


Describe Gabriel's phthalimide synthesis. (Give reaction)


Acetamide and ethyl amide can be distinguished by reacting with.


Which of the following compound is expected to be most basic?


A compound 'A' on reduction with iron scrap and hydrochloric acid gives compound 'B' with molecular formula C6H7N. Compound 'B' on reaction with CHCl3 and alcoholic KOH produces an obnoxious smell of carbylamine due to the formation of 'C'. Identify 'A', 'B' and 'C' and write the chemical reactions involved.


Give reasons for the following:

Ammonolysis of alkyl halides is not a good method to prepare pure primary amines.


Which of the following reaction DOES NOT involve Hoffmann bromamide degradation?


Methyl amine on reaction with chloroform in the presence of NaOH gives ______.


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


Identify the compo ds A and B in the following reactions:

\[\ce{A ->[Nitrating mixture] B ->[(i) Sn/cone. HCI][(ii) NaOH] Aniline}\]


Write a short note on Ammonolysis.


Write short note on the following:

Ammonolysis


Write a short note on the following:

Ammonolysis.


Write a short note on the following:

Ammonolysis


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×