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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Write a short note on Hofmann elimination - Chemistry

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प्रश्न

Write a short note on Hofmann elimination

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उत्तर

When tetraalkylammonium halide is heated with moist silver oxide, it gives quaternary ammonium hydroxide which is a deliquescent crystalline solid, and strongly basic like NaOH or KOH.
Quaternary ammonium hydroxides on strong heating undergo b-elimination to give an alkene, the reaction is called Hofmann elimination. The least substituted alkene is obtained as a major product (in contrast to Saytzeff elimination).

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Chemical Properties of Amines
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2018-2019 (March) Set 1

संबंधित प्रश्‍न

Which one of the following compounds does not react with acetyl chloride?


Answer in one sentence.

How many moles of methyl bromide are required to convert ethanamine to N, N-dimethyl ethanamine?


Answer in one sentence.

Write the balanced chemical equations for the action of dil H2SO4 on diethylamine.


Answer the following

Write a reaction to convert ethylamine into methylamine.


Answer the following.

What is the action of acetic anhydride on ethylamine?


Answer the following

Write diazotisation reaction of aniline?


Write the name of the reaction in which aromatic primary amines produce offensive smell.


Write the reactions to bring about the following conversions.

Nitroalkane to Alkylamine


Write the reactions to bring about the following conversions.

Alkyl cyanide to Alkylamine


\[\ce{X ->[Sn/HCl] Propan-2-amine}\]

Compound X is ____________.


Acylation of ethanamine to form N-ethylethanamide is an example of ____________ reaction.


Which of the following will NOT give positive carbylamine test?


\[\ce{X ->[LiAlH4 in ether] Y ->[C2H5Br] Z -> Triethylamine}\]

X and Z are ____________ respectively.


α-chlorosodium acetate on boiling with aqueous sodium nitrite gives ______.


Which one of the following compounds when heated with KOH and CHCl3 gives carbylamine test?


Which of the following on heating with chloroform and alcoholic potassium hydroxide yields carbylamine?


Which one of the following methods is NOT used for the synthesis of amines?


When propanamide is treated with bromine and alcoholic NaOH, it gives ______.


Which of the following amines liberates nitrogen gas when treated with nitrous acid?


Identify the X in the reaction.

\[\ce{R - NH2 + HNO2 ->[NaNO2 + HCl][273 - 278 K] X ->[H2O] R - OH + N2\uparrow + HCl}\]


Write the reaction of Acetyl chloride on triethylamine.


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