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Alkylation of aromatic compounds with al...

Alkylation of aromatic compounds with aliphatic compounds like halides in presence of Lewis acid catalyst is known as Friedel-Crafts alkylation. It is an exapmle of electrophilic substitution.

In the process of acylation, `R-overset(O)overset(||)C-` group is introduced to the ring. Compounds having (`+` mesomeric groups) like `-NH_(2)` do not give Friedel-Crafts reaction because these compounds undergo conjugation with the catalyst. In the alkylation process, most branched alkyl group is substituted because isomerisation of carbonium ion takes place. In some Friedel-Crafts reactions, the nature of product changes with the solvent used in the reaction.
Predict whether the following statements are ture or false:
`AlCl_(3)` (aq.) is used as catalst in Frieded-Crafts reaction:
(a) True (b) False

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Alkylation of aromatic compounds with aliphatic compounds like halides in presence of Lewis acid catalyst is known as Friedel-Crafts alkylation. It is an exapmle of electrophilic substitution. In the process of acylation, R-overset(O)overset(||)C- group is introduced to the ring. Compounds having ( + mesomeric groups) like -NH_(2) do not give Friedel-Crafts reaction because these compounds undergo conjugation with the catalyst. In the alkylation process, most branched alkyl group is substituted because isomerisation of carbonium ion takes place. In some Friedel-Crafts reactions, the nature of product changes with the solvent used in the reaction. Predict whether the following statements are ture or false: Following compounds easily give Friedel-Crafts reaction: (a) True (b) False

Alkylation of aromatic compounds with aliphatic compounds like halides in presence of Lewis acid catalyst is known as Friedel-Crafts alkylation. It is an exapmle of electrophilic substitution. In the process of acylation, R-overset(O)overset(||)C- group is introduced to the ring. Compounds having ( + mesomeric groups) like -NH_(2) do not give Friedel-Crafts reaction because these compounds undergo conjugation with the catalyst. In the alkylation process, most branched alkyl group is substituted because isomerisation of carbonium ion takes place. In some Friedel-Crafts reactions, the nature of product changes with the solvent used in the reaction. Predict whether the following statements are ture or false: Carbocations undergo isomerisation in Frieded-Crafts reaction. In each of the following alkyl halides the isomerisation takes place: CH_(3)-CH_(2)-CH_(2)-Cl , CH_(3)-CH_(2)-CH_(2)-CH_(2)-Cl (a) True (b) False

Alkylation of aromatic compounds with aliphatic compounds like halides in presence of Lewis acid catalyst is known as Friedel-Crafts alkylation. It is an exapmle of electrophilic substitution. In the process of acylation, R-overset(O)overset(||)C- group is introduced to the ring. Compounds having ( + mesomeric groups) like -NH_(2) do not give Friedel-Crafts reaction because these compounds undergo conjugation with the catalyst. In the alkylation process, most branched alkyl group is substituted because isomerisation of carbonium ion takes place. In some Friedel-Crafts reactions, the nature of product changes with the solvent used in the reaction. Predict whether the following statements are ture or false: When benzene is treated with CHCl_(3) in presence of AlCl_(3) catalyst, the following reaction takes place: (a) True (b) False

Alkylation of aromatic compounds with aliphatic compounds like halides in presence of Lewis acid catalyst is known as Friedel-Crafts alkylation. It is an exapmle of electrophilic substitution. In the process of acylation, R-overset(O)overset(||)C- group is introduced to the ring. Compounds having ( + mesomeric groups) like -NH_(2) do not give Friedel-Crafts reaction because these compounds undergo conjugation with the catalyst. In the alkylation process, most branched alkyl group is substituted because isomerisation of carbonium ion takes place. In some Friedel-Crafts reactions, the nature of product changes with the solvent used in the reaction. Predict whether the following statements are ture or false: Diphenyl methane is obtained when benzene is treated with dichloro methane is presence of anhydrous AlCl_(3) : (a) True (b) False

Friedel Craft Alkylation

Friedel Craft Alkylation

Friedel Craft Alkylation and acylation

Which compound does not give friedel-crafts reaction?

Anhydrous AlCl_(3) is used as a catalyst in the friedel-crafts reaction because it is

Knowledge Check

  • By Friedel - Crafts acylation reaction, the effective electrophile be

    A
    `AlCl_3`
    B
    `C^(+)O Cl`
    C
    `RC^(+)O`
    D
    RCOCl
  • Anhydrous AlCl_(3) is used as a catalyst in the friedel-crafts reaction because it is

    A
    an electron-rich molecule
    B
    solution in ether
    C
    ionizable to `Al^(3+)` and `Cl^(-)`
    D
    an electr-deficient molecule