Advertisements
Advertisements
प्रश्न
Write a short note on Hofmann elimination
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).
APPEARS IN
संबंधित प्रश्न
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 methanamine into ethanamine.
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.
What is the action of acetic anhydride on triethylamine?
Write the name of the reaction in which aromatic primary amines produce offensive smell.
Write the name of the gas evolved when a primary amine is reacted with nitrous acid.
Write the reactions to bring about the following conversions.
Methyl chloride to Ethanamine
\[\ce{X ->[Sn/HCl] Propan-2-amine}\]
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?
Identify the amine formed when ethyltrimethyl ammonium iodide is treated with silver hydroxide and further heated strongly.
Select the CORRECT option about the following reaction.
\[\ce{CH3 - CH2 - N^+(CH3)3 - I^- ->[Moist][Ag2O] X ->[\Delta] Y + Z + H2O}\]
\[\ce{X ->[LiAlH4 in ether] Y ->[C2H5Br] Z -> Triethylamine}\]
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 group from following decreases the basic strength in substituted aniline?
\[\ce{Dimethylamine + Benzoyl chloride ->[Pyridine] ?}\]
Product formed is:
Identify reagent 'A' in the following conversion?
\[\ce{N-N Dimethyl aniline ->[A][273-278 K] 4-nitroso-N-N-dimethylaniline}\]
What is the product obtained in the following reaction?
Which of the following amines liberates nitrogen gas when treated with nitrous acid?
What is the product obtained when ethyl amine is heated with large excess of ethyl iodide?
Select the compound which on treatment with nitrous acid liberates nitrogen.
Which of the following compounds gives a dye test?
Identify the X in the reaction.
\[\ce{R - NH2 + HNO2 ->[NaNO2 + HCl][273 - 278 K] X ->[H2O] R - OH + N2\uparrow + HCl}\]
