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

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प्रश्न

Answer the following

Identify A and B in the following reactions.

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

एका वाक्यात उत्तर
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उत्तर

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

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पाठ 13: Amines - Exercises [पृष्ठ २९७]

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बालभारती Chemistry [English] Standard 12 Maharashtra State Board
पाठ 13 Amines
Exercises | Q 3.01 | पृष्ठ २९७

संबंधित प्रश्‍न

How is ethyl amine prepared from methyl iodide?


Illustrate the following reaction giving suitable example in each case:Gabriel phthalimide synthesis


How do you convert the following: C6H5CONH2 to C6H5NH2


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

\[\ce{C6H5NO2 ->[Fe/HCl] A ->[NaNO2 + HCl][273 K] B ->[H2O/H+][\Delta] C}\]


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

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


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


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


Answer in one sentence.

Which amide does produce ethanamine by Hofmann bromamide degradation reaction?


Write the order of reactivity of alkyl halides with ammonia.


Why cannot aniline be prepared by Gabriel phthalimide synthesis?


Identify compound 'B' in following series of reactions?

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


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).


What product is formed when \[\ce{R - C ≡ N}\] is hydrolysed?


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


\[\ce{CH3-CN ->[Na/C2H5OH]}\]

The product formed is ____________.


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 reagents is used in Mendius reduction reaction of alkyl cyanide?


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


Which of the following does NOT give carbylamine test?


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:


Quaternary ammonium salt is formed:


Which of the following reagents would not be a good choice for reducing an aryl nitro compound to an amine?


The best reagent for converting 2–phenylpropanamide into 2-phenylpropanamine is ______.


Reduction of aromatic nitro compounds using \[\ce{Fe}\] and \[\ce{HCl}\] gives ______.


Which of the following compounds is the weakest Brönsted base?


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


What is the best reagent to convert nitrile to primary amine?


Identify A and B in the following reaction.


Write following conversions:

acetanilide `->` p-nitroaniline


How will you bring out the following conversion?


How will you carry out the following conversions?


How will you carry out the following conversions?


Account for the following:

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


The compound X is which of the following?

\[\ce{CH3CN ->[Na + C2H5OH] x}\]


Reduction of nitro alkanes yields which compound?


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


C6H5CONHCH3 can be converted into C6H5CH2NHCH3 by:-


Which of the following CANNOT be prepared by ammonolysis of alkyl halide?


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.


  1. Phenyl methenamine
  2. N, N - Dimethylaniline
  3. N - Methyl aniline
  4. Benzenamine

Choose the correct order of the basic nature of the above amines.


The amine 'A' when treated with nitrous acid gives yellow oily substance. The amine A is ______.


Identify the product ‘C’ in the following reaction.

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


Write short note on the following:

Ammonolysis


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