NEETChemistryHydrocarbons
Consider the following sequence of reactions: 2-Methylprop-1-ene [ Peroxide ] HBr X [ Dry ether ] Na Y The IUPAC name of the major product Y is:
Options
- A2,2,3,3-Tetramethylbutane
- B2,4-Dimethylhexane
- C2,5-Dimethylhexane
- DOctane
Correct answer
C. 2,5-Dimethylhexane
Step-by-step solution
2-Methylprop-1-ene ( CH ₃- C ( CH ₃)= CH ₂ ) reacts with HBr in the presence of peroxide to undergo anti-Markovnikov addition. The bromine atom adds to the less substituted carbon, yielding 1-bromo-2-methylpropane as intermediate X. 1-Bromo-2-methylpropane (X) undergoes the Wurtz reaction when treated with sodium in dry ether. Two molecules of the alkyl halide couple together to form an alkane. 2 CH ₃- CH ( CH ₃)- CH ₂ Br + 2 Na Dry ether CH ₃- CH ( CH ₃)- CH ₂- CH ₂- CH ( CH ₃)- CH ₃ + 2 NaBr The longest carbon ch