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प्रश्न
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?
विकल्प
\[\ce{CH3Br}\]
\[\ce{C6H5Br}\]
\[\ce{C6H5CH2Br}\]
\[\ce{C2H5Br}\]
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उत्तर
\[\ce{C6H5CH2Br}\]
Explanation:
SN1 reaction occurs in two steps. In first step R – X bond is broken to produce a carbocation which is attacked by nucleophile. The greater the stability of carbocation, the greater will be the rate of reaction. Benzylic halides show high reactivity towards SN1 reaction.
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संबंधित प्रश्न
How are propan-1-amine and propan-2-amine prepared from oxime?
Illustrate the following reaction giving suitable example in each case:Gabriel phthalimide synthesis
Accomplish the following conversion:
Benzyl chloride to 2-phenylethanamine
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?
Account for the following:
Gabriel phthalimide synthesis is not preferred for preparing aromatic primary amines.
Explain Hoffmann’s exhaustive alkylation with suitable reactions.
Alkyl cyanides on reduction by sodium and ethanol give primary amines. This reaction is called as ____________.
\[\ce{CH3-CN ->[Na/C2H5OH]}\]
The product formed is ____________.
Identify the product obtained when benzamide is treated with bromine and aqueous sodium hydroxide?
In aqueous phase the order of basic strength of alkylamine is ______.
Quaternary ammonium salt is formed:
The best reagent for converting 2–phenylpropanamide into 2-phenylpropanamine is ______.
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.
Acetamide and ethyl amide can be distinguished by reacting with.
When primary amines are treated with HCl, the product obtained is which of the following?
Give reasons for the following:
Ammonolysis of alkyl halides is not a good method to prepare pure primary amines.
Identify the product ‘C’ in the following reaction.
\[\ce{Aniline ->[(CH3CH)2O][Pyridine] A ->[Br2][CH3COOH] B ->[H^+ or OH^-] C}\]
