MHT CET202620 April 2026Morning ShiftChemistryAminesActual
Identify the substrate 'A' in the following reaction. A [ ii) ] i) Moist Ag ₂ O CH ₃ CH ₂ N(CH ₃)₂ + CH ₂ = CH ₂
Options
- ADiethyldimethylammonium halide
- BEthyltrimethylammonium halide
- CDiethyldimethylammonium hydroxide
- DEthyltrimethylammonium hydroxide
Correct answer
A. Diethyldimethylammonium halide
Step-by-step solution
The given reaction is the Hofmann elimination of a quaternary ammonium salt. Substrate A reacts with moist Ag ₂ O to form a quaternary ammonium hydroxide, which on heating undergoes -elimination to yield an alkene, a tertiary amine, and water. The products obtained are CH ₃ CH ₂ N(CH ₃)₂ (N,N-dimethylethylamine) and CH ₂= CH ₂ (ethene). The quaternary ammonium ion must contain the alkyl groups present in the tertiary amine along with the alkyl group that underwent elimination to form the alkene. Combining an ethyl