What is meant by hydroboration-oxidation reaction?Illustrate it with an example.
What is meant by hydroboration-oxidation reaction?Illustrate it with an example.
Solution and Explanation
The addition of borane followed by oxidation is known as the hydroboration-oxidation reaction. For example,propan-1-ol is produced by the hydroboration-oxidation reaction of propene. In this reaction, propene reacts with diborane(BH3)2 to form trialkyl borane as an additional product.This additional product is oxidized to alcohol by hydrogen peroxide in the presence of aqueous sodium hydroxide
Top Questions on Alcohols, Phenols And Ethers
- Write chemical equations of the following reactions:
(i) Phenol is treated with conc. HNO3.
(ii) Propene is treated with B2H6 followed by oxidation by H2O2/OH−.
(iii) Sodium t-butoxide is treated with CH3Cl.- CBSE CLASS XII - 2025
- Chemistry
- Alcohols, Phenols And Ethers
- Assertion (A): The boiling point of ethanol is higher than that of methoxymethane.
Reason (R): There is intramolecular hydrogen bonding in ethanol.- CBSE CLASS XII - 2025
- Chemistry
- Alcohols, Phenols And Ethers
Write the IUPAC name of the product formed in the Reimer-Tiemann reaction.
- CBSE CLASS XII - 2025
- Chemistry
- Alcohols, Phenols And Ethers
Arrange the following compounds in increasing order of their boiling points:
- CBSE CLASS XII - 2025
- Chemistry
- Alcohols, Phenols And Ethers
- Give a simple chemical test to distinguish between butan-1-ol and butan-2-ol.
- CBSE CLASS XII - 2025
- Chemistry
- Alcohols, Phenols And Ethers
Questions Asked in CBSE CLASS XII exam
- You are required to design an air-filled solenoid of inductance 0.016 H having a length 0.81 m and radius 0.02 m. The number of turns in the solenoid should be:
- CBSE CLASS XII - 2025
- Electromagnetic induction
- Given \[ A = \begin{bmatrix} -4 & 4 & 4 \\ -7 & 1 & 3 \\ 5 & -3 & -1 \end{bmatrix}, \quad B = \begin{bmatrix} 1 & -1 & 1 \\ 1 & -2 & -2 \\ 2 & 1 & 3 \end{bmatrix} \] find \( AB \). Hence, solve the system of linear equations: \[ x - y + z = 4, \] \[ x - 2y - 2z = 9, \] \[ 2x + y + 3z = 1. \]
- A vector \( \mathbf{a} \) makes equal angles with all the three axes. If the magnitude of the vector is \( 5\sqrt{3} \) units, then find \( \mathbf{a} \).
- Solve the following linear programming problem graphically: \[ \text{Minimise } Z = 2x + y \] subject to the constraints: \[ 3x + y \geq 9, \] \[ x + y \geq 7, \] \[ x + 2y \geq 8, \] \[ x, y \geq 0. \]
- CBSE CLASS XII - 2025
- Linear Programming Problem
Two batteries of emf's \(3V \& 6V\) and internal resistances 0.2 Ω \(\&\) 0.4 Ω are connected in parallel. This combination is connected to a 4 Ω resistor. Find:
(i) the equivalent emf of the combination
(ii) the equivalent internal resistance of the combination
(iii) the current drawn from the combination- CBSE CLASS XII - 2025
- Electrical Circuits
