MHT CET202619 April 2026Morning ShiftChemistryHaloalkanes and HaloarenesActual
Which from the following compounds is not obtained when methyl bromide is treated with ethyl bromide in presence of sodium metal in dry ether?
Options
- An-Butane
- BEthane
- CPropane
- D2-methyl propane
Correct answer
D. 2-methyl propane
Step-by-step solution
The reaction of methyl bromide and ethyl bromide with sodium metal in dry ether is an example of the Wurtz reaction. The alkyl free radicals formed during the reaction are methyl radical ( CH₃^ ) and ethyl radical ( C₂H₅^ ). These radicals can undergo self-coupling as well as cross-coupling to give a mixture of alkanes: CH₃^ + CH₃^ CH₃-CH₃ (Ethane) C₂H₅^ + C₂H₅^ CH₃-CH₂-CH₂-CH₃ (n-Butane) CH₃^ + C₂H₅^ CH₃-CH₂-CH₃ (Propane) 2-methyl propane cannot be formed by the coupling of methyl and ethyl radicals. Therefore, 2-