NTA Abhyas JEE Main2020ChemistryAlcohols Phenols and EthersPractice
The number of alkenes (including stereoisomers) which can produce 2-butanol by the successive treatment of (i) B 2 H 6 in tetrahydrofuran solvent and (ii) alkaline H 2 O 2 solution is/are
Correct answer
2
Step-by-step solution
Structure of butan-2-ol is C H 3 - C | H O H - C H 2 - C H 3 Now, the simple format of HBO (hydroboration oxidant) reaction is R − CH = CH 2 + B 2 H 6 → THF ( R − CH 2 CH 2 ) 3 B → H 2 O 2 / O − H RCH 2 CH 2 OH | So, C H 3 - C H = C H - C H 3 definitely an option as the mechanistic approach for the B H 3 addition is as ( CH 3 CH 2 − CHCH 3 ) 3 B →   H 2 O 2 / O − H   CH 3 CH 2 − C | H OH CH 3 Now, C H 3 - C H = C H - C H 3 can have both cis and trans-forms.