Question:
Which reaction is used to synthesize straight-chain alkylbenzenes?
Which reaction is used to synthesize straight-chain alkylbenzenes?
Show Hint
Direct alkylation of benzene rearranges the carbocation. Acylation followed by reduction avoids this.
Updated On: Nov 12, 2026
- Etard
- Rosenmund reduction
- Stephen's reaction
- Wolf kishner reduction
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
Friedel-Crafts alkylation with a straight-chain halide gives branched products because the carbocation rearranges.
Step 2: Alternative Route
First do Friedel-Crafts acylation to get an acylbenzene, then reduce the C=O group to \(\text{CH}_2\).
Step 3: Reduction Choice
From the given options, the Wolff-Kishner reduction does this conversion.
Final Answer:
Wolff-Kishner reduction gives straight-chain alkylbenzenes. \[ \boxed{\text{(D) }\text{Wolf kishner reduction}} \]
Friedel-Crafts alkylation with a straight-chain halide gives branched products because the carbocation rearranges.
Step 2: Alternative Route
First do Friedel-Crafts acylation to get an acylbenzene, then reduce the C=O group to \(\text{CH}_2\).
Step 3: Reduction Choice
From the given options, the Wolff-Kishner reduction does this conversion.
Final Answer:
Wolff-Kishner reduction gives straight-chain alkylbenzenes. \[ \boxed{\text{(D) }\text{Wolf kishner reduction}} \]
Was this answer helpful?
0
0
Top MHT CET Chemistry Questions
- The temperature of $32^{\circ}C$ is equivalent to
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
- If a metal crystallises in bcc structure with edge length of unit cell $4.29 \times 10^{-8}\, cm$ the radius of metal atom is
- Which of the following oxides can act both as an oxidising agent as well as reducing agent ?
- "The mass and energy both are conserved in an isolated system", is the statement of
View More Questions
Top MHT CET Chemical Reactions of Aldehydes Ketones and Carboxylic Acids Questions
- The Wolff-Löffler-Kishner reduction is used to convert which of the following compounds into the corresponding alkane?
- Identify the product obtained when alkyl alkanoate is hydrolysed with dilute $\text{HCl}$.
- Identify the product obtained when alkyl alkanoate is hydrolysed with dilute $\text{HCl}$.
- Which from following reactions converts carbonyl group of aldehydes and ketones to methylene group on treatment with zinc amalgam and concentrated HCl ?
- Identify the product formed in the following reaction,
$\text{CH}_3-\text{CH}=\text{CH}-\text{CH}_2-\text{CHO} \xrightarrow{\text{(i) LiAlH}_4 \text{ (ii) H}_2\text{O}} \text{Products}$
View More Questions
Top MHT CET Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- The temperature of $32^{\circ}C$ is equivalent to
- The line $5x + y - 1 = 0$ coincides with one of the lines given by $5x^2 + xy - kx - 2y + 2 = 0 $ then the value of k is
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
View More Questions