On Reaction Of Chlorobenzene With Acetyl Chloride In Class ... - Vedantu

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AnswerQuestion Answers for Class 12Class 12 BiologyClass 12 ChemistryClass 12 EnglishClass 12 MathsClass 12 PhysicsClass 12 Social ScienceClass 12 Business StudiesClass 12 EconomicsQuestion Answers for Class 11Class 11 EconomicsClass 11 Computer ScienceClass 11 BiologyClass 11 ChemistryClass 11 EnglishClass 11 MathsClass 11 PhysicsClass 11 Social ScienceClass 11 AccountancyClass 11 Business StudiesQuestion Answers for Class 10Class 10 ScienceClass 10 EnglishClass 10 MathsClass 10 Social ScienceClass 10 General KnowledgeQuestion Answers for Class 9Class 9 General KnowledgeClass 9 ScienceClass 9 EnglishClass 9 MathsClass 9 Social ScienceQuestion Answers for Class 8Class 8 ScienceClass 8 EnglishClass 8 MathsClass 8 Social ScienceQuestion Answers for Class 7Class 7 ScienceClass 7 EnglishClass 7 MathsClass 7 Social ScienceQuestion Answers for Class 6Class 6 ScienceClass 6 EnglishClass 6 MathsClass 6 Social ScienceQuestion Answers for Class 5Class 5 ScienceClass 5 EnglishClass 5 MathsClass 5 Social ScienceQuestion Answers for Class 4Class 4 ScienceClass 4 EnglishClass 4 MathsOn reaction of chlorobenzene with acetyl chloride in presence of $AlC{{l}_{3}}$, the major product formed is- (A) 1-Chloro-2-methylbenzene(B) 1-Chloro-4-ethylbenzene(C) 2-Chloro Acetophenone(D) 4-Chloro AcetophenoneAnswerVerified509.1k+ viewsHint: This is an example of a Friedel – Crafts acylation reaction. Cl atom is an ortho para directing group. Also take into consideration the steric effect and the inductive effect. Complete answer:The reaction of chlorobenzene with acetyl chloride in presence of $AlC{{l}_{3}}$ can also be called as Freidel – Crafts acylation of chlorobenzene.Let us first understand the Friedel – Crafts reactionThe Friedel – Crafts reaction is called an organic coupling reaction.This is because, in the Friedel – Crafts reaction, an organic aromatic substitution occurs which leads to attachment of a substituent to the aromatic ring.For this reaction, $AlC{{l}_{3}}$ is used as a catalyst. The role of the catalyst is to extract chlorine atoms from the reactant and generate an electrophile.Friedel – Crafts reaction is of 2 types - Friedel – Crafts alkylation and Friedel – Crafts acylation.The reaction of chlorobenzene with acetyl chloride in presence of $AlC{{l}_{3}}$ is a Friedel – Crafts acylation reaction.Friedel-Crafts acylation is a reaction in which the addition of an acyl group to an aromatic ring takes place. The reaction will lead to the aromatic ring being transformed into a ketone. Our reactant is not benzene. It is chlorobenzene. The Cl atom in Chlorobenzene is an ortho-para directing group. This is because Cl has a lone pair. Therefore, in the resonating structures of chlorobenzene, the electrons will be delocalised into the ring and the electron density on ortho and para position will be increased. The electron density will be more at ortho and para positions as there are resonating structures in which the negative charge is on the ortho para positions.Hence, the Friedel – Crafts acylation of chlorobenzene will yield us both ortho and para products.Therefore, the reaction of chlorobenzene with acetyl chloride in presence of $AlC{{l}_{3}}$, will yield the products - 2-Chloro Acetophenone and 4-Chloro Acetophenone. - Out of the 2 products, 4-Chloro Acetophenone will be the major product. - This is because the steric hindrance at the ortho position and the -I effect of the Cl atom results in deactivation of the benzene ring.Note: There are actually 2 products formed in the reaction. The major product will be decided by steric hindrance and inductive effect of the Cl atom. It is important to consider these effects while predicting the major product.Recently Updated PagesMaster Class 12 Business Studies: Engaging Questions & Answers for SuccessMaster Class 12 Economics: Engaging Questions & Answers for SuccessMaster Class 12 English: Engaging Questions & Answers for SuccessMaster Class 12 Maths: Engaging Questions & Answers for SuccessMaster Class 12 Social Science: Engaging Questions & Answers for SuccessMaster Class 12 Chemistry: Engaging Questions & Answers for SuccessMaster Class 12 Business Studies: Engaging Questions & Answers for SuccessMaster Class 12 Economics: Engaging Questions & Answers for SuccessMaster Class 12 English: Engaging Questions & Answers for SuccessMaster Class 12 Maths: Engaging Questions & Answers for SuccessMaster Class 12 Social Science: Engaging Questions & Answers for SuccessMaster Class 12 Chemistry: Engaging Questions & Answers for Success

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