The product of Friedel-Crafts Acylation reactions are ___________a)Alkylbenzeneb)Alkylaminec)Arylketoned)HalobenzeneCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Friedel-Crafts Acylation Reactions and the Product

Friedel-Crafts acylation is a type of organic reaction involving the acylation of aromatic compounds. It is named after Charles Friedel and James Crafts, who first described this reaction in 1877.

Reaction Mechanism:
The Friedel-Crafts acylation reaction involves the reaction of an acyl halide (usually an acid chloride) with an aromatic compound in the presence of a Lewis acid catalyst, typically aluminum chloride (AlCl3). The Lewis acid catalyst helps to activate the acyl halide and facilitates the electrophilic aromatic substitution reaction.

The reaction mechanism for Friedel-Crafts acylation can be summarized as follows:

1. Activation of the acyl halide: The Lewis acid catalyst (AlCl3) coordinates with the acyl halide, making it more electrophilic.

2. Formation of the electrophilic acylium ion: The acyl halide is further activated by the Lewis acid, leading to the formation of an electrophilic acylium ion.

3. Attack of the aromatic compound: The aromatic compound acts as a nucleophile and attacks the electrophilic acylium ion. This leads to the substitution of one of the hydrogen atoms on the aromatic ring with the acyl group.

4. Regeneration of the catalyst: The Lewis acid catalyst is regenerated in the last step of the reaction, allowing it to participate in further cycles of the reaction.

Product of Friedel-Crafts Acylation:
The product of Friedel-Crafts acylation is an arylketone. A ketone group (-C=O) is introduced onto the aromatic ring during the acylation reaction.

Reason for the Correct Answer:
Option C, 'Arylketone,' is the correct answer because it accurately represents the product formed in a Friedel-Crafts acylation reaction. Alkylbenzenes (option A) are formed in Friedel-Crafts alkylation reactions, where an alkyl group is introduced onto the aromatic ring. Alkylamines (option B) and halobenzenes (option D) are not products of Friedel-Crafts acylation reactions.

In summary, the Friedel-Crafts acylation reaction results in the formation of arylketones, making option C the correct answer.

Answer

The product of Friedel-Crafts Acylation reactions are Arylketone. The acylated products may easily be converted to the corresponding alkanes via Clemmensen Reduction or Wolff-Kishner Reduction.

Answer

Friedel-Crafts Acylation reactions involve the acylation of aromatic compounds using acyl halides (such as acetyl chloride) or acid anhydrides in the presence of a Lewis acid catalyst, usually aluminum chloride (AlCl3). This reaction is an important method for the synthesis of arylketones.

Here is a detailed explanation of why the correct answer is option 'C' (Arylketone):

1. Friedel-Crafts Acylation Reaction:
- In a Friedel-Crafts Acylation reaction, the acyl group (RCO-) is attached to the aromatic ring, resulting in the formation of an arylketone.
- The reaction proceeds through the formation of an acylium ion intermediate, which is stabilized by the Lewis acid catalyst.
- The acylium ion then reacts with the aromatic ring to form a new carbon-carbon bond, resulting in the acylation of the aromatic compound.

2. Formation of Arylketone:
- The product of a Friedel-Crafts Acylation reaction is an arylketone, which is a compound containing an acyl group (-CO-) attached to an aromatic ring.
- The acyl group can be a simple alkyl group, such as methyl, ethyl, or propyl, or it can be a more complex group, such as a benzoyl group.
- The aromatic ring can be any benzene derivative, such as benzene itself or substituted benzene compounds.

3. Example:
- Let's consider an example reaction where benzene reacts with acetyl chloride (CH3COCl) in the presence of AlCl3 as the catalyst.
- The reaction can be represented as follows:
benzene + CH3COCl → benzene-CH3CO + HCl
- In this example, the product is benzene-CH3CO, which is an arylketone.
- The acetyl group (CH3CO-) is attached to the benzene ring, resulting in the formation of an arylketone.

In conclusion, the product of Friedel-Crafts Acylation reactions is an arylketone (option 'C'). These reactions involve the acylation of aromatic compounds using acyl halides or acid anhydrides in the presence of a Lewis acid catalyst. The acyl group is attached to the aromatic ring, resulting in the formation of an arylketone.

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