JEE Main202329 Jan 2023Evening ShiftChemistryHaloalkanes and HaloarenesActual
The one giving maximum number of isomeric alkenes on dehydrohalogenation reaction is (excluding rearrangement)
Options
- A1 -Bromo- 2 -methylbutane
- B2 -Bromopropane
- C2 -Bromopentane
- D2 -Bromo- 3 , 3 -dimethylpentane
Correct answer
C. 2 -Bromopentane
Step-by-step solution
In dehydrohalogenation reactions, the preferred product is that alkene which has the greater number of alkyl groups attached to the doubly bonded carbon atoms. Thus, 2-bromopentane gives pent-2-ene as the major product. Rest all bromides are having only one type of beta hydrogen, hence, only one possible alkene is formed.