In the Friedel Craft's acylation reaction, the effective
electrophile is
(a) RCOCl⊕ (b) AlCl₃
(c) RCOCl (d) RCO⊕
Answers
Answered by
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In the Friedel Craft's acylation reaction, the effective electrophile is (d) RCO⊕ as:
1. The acyl halide react with lewis acid( AlCl₃) to form a complex.
2. The AlCl3 enhances the electrophilicity of the acyl halide by complexing with the halide.
2. Loss of the halide to the lewis acid takes place and form the electrophilic acylium ion(RCO⊕).
3. The acylium ion is stabilised by resonance. This extra stability prevents the problems associated with the rearrangement of simple carbocations .
Answered by
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RCO⊕ is the attacking species in Friedel craft acylation.
Explanation:
- Friedel craft reactions are very important in organic chemistry due to its carbon carbon bond formation.
- This reaction uses lewis acid as catalyst.
- Catalysts usually used are FeCl3 or AlCl3.
- These acids have vacant orbitals where it can accommodate anions.
- The reaction starts by the temporary complexing with the anion of the acyl group like chloride which is taken by Lewis base.
- Now this leads to fromation of RCO⊕ which is attacks the benzene ring due to its high electron density.
- So its an electrophilic substitution reaction.
- Then in the end hydrogen halide is expelled out by the reaction.
For more information about Friedel Craft's Acylation,
https://brainly.in/question/9097063
Difference between friedel craft acylation and alkylation
https://brainly.in/question/2975064
friedel crafts acylation is more favourable than alkylation - Brainly.in
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