NEET2026ChemistryChapterActual
Given below are two statements: Statement I: 1-Butene on treatment with diborane gives an addition product with the formula ( CH ₃ CH ₂ CH ( CH ₃) )₃ B . Statement II: Oxidation of ( CH ₃ CH ₂ CH ( CH ₃) )₃ B with hydrogen peroxide in the presence of NaOH gives butan-2-ol. In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth Statement I and Statement II are correct
- BBoth Statement I and Statement II are incorrect
- CStatement I is correct but Statement II is incorrect
- DStatement I is incorrect but Statement II is correct
Correct answer
D. Statement I is incorrect but Statement II is correct
Step-by-step solution
Hydroboration of 1-butene ( CH ₃ CH ₂ CH = CH ₂ ) with diborane ( B ₂ H ₆ ) proceeds via anti-Markovnikov addition, where the boron atom attaches to the less sterically hindered terminal carbon. This yields tri-n-butylborane, ( CH ₃ CH ₂ CH ₂ CH ₂)₃ B . Statement I claims the product is tri-sec-butylborane, ( CH ₃ CH ₂ CH ( CH ₃))₃ B , which is incorrect. Oxidation of tri-sec-butylborane, ( CH ₃ CH ₂ CH ( CH ₃))₃ B , with hydrogen peroxide ( H ₂ O ₂ ) in an alkaline medium ( NaOH ) replaces the boron atom with a hy