The first step in the mechanism of benzene bromination is the formation of a complex between Br Inorganic compounds such as metals also undergo halogenation. The electrophile is sulphur trioxide, and this arises in one of two ways depending on which sort of acid you are using. Overall transformation : Ar-H toAr-X Reagent : normally the halogen (e.g. In particular, this intermediate product can separate it out. HALOGENATION OF BENZENE AND METHYLBENZENE This page looks at the reactions of benzene and methylbenzene (toluene) with chlorine and bromine under various conditions. Concentrated sulphuric acid contains traces of SO 3 due to slight dissociation of the acid. Halogenation of Benzene, Nitration of Benzene, Sulfonation of Benzene and Alkylation and Acylation of Benzene are some various chemical reactions of Benzene. Methyl groups are 2,4-directing, which means that incoming groups will tend to go into the 2 or 4 positions on the ring - assuming the methyl group is in the 1 position. This is exactly the same as the reaction with benzene, except that you have to worry about where the halogen atom attaches to the ring relative to the position of the methyl group. Halogenation of Benzene (review of Chapter 12) Reaction type: Electrophilic Aromatic Substitution. Step 2: The π electrons of aromatic C=C behave as a nucleophile which attacks the electrophilic Br and displaces iron tetrabromide. Halogenation of the addition of olefins will produce an intermediate halide. Draw the Lewis structure Ofthe electrophile in the bromination Of benzene under FeBry catalysis (3 pts): I c) Draw the Lewis structure of the intermediate formed in the ratc determining Step of the reaction of benzene with chlorine and aluminum trichloride (3 pts): I d) Provide the product and an arrow-pushing mechanism for the following Benzene is a colorless liquid that was first discovered by Michael Faraday in 1825. The molecular formula of benzene is C6H6. Benzene reacts with chlorine or bromine in the presence of a catalyst, replacing one of the hydrogen atoms on the ring by a … The mechanisms for several of these reactions are covered elsewhere on the site and you will find links to these other pages.

Second, the reaction conditions for benzene halogenation are much more severe than the conditions for addition of halogens to an alkene. Being so exothermic, a reaction of flourine with benzene is explosive! This is exactly the same as the reaction with benzene, except that you have to worry about where the halogen atom attaches to the ring relative to the position of the methyl group. The halogenation of aromatic compounds is an electrophilic halogenation reaction. The halogenation of benzene. Methyl groups are 2,4-directing, which means that incoming groups will tend to go into the 2 or 4 positions on the ring - assuming the methyl group is in the 1 position.