What happens when toluene reacts with Br2?
Toluene reacts with bromine in the presence of light to give benzyl bromide, while in the presence of FeBr3, it gives p−bromotoluene.
What does Br2 and FeBr3 do?
The bromine molecule reacts with FeBr3 by donating a pair of its electrons to the Lewis acid, which creates a more polar Br-Br bond, and thus a more reactive electrophile. Benzene will now attack this electrophile to generate the sigma complex.
What is the product when you react benzene with FeBr3 Br2?
When benzene reacts with bromine under harsh conditions—liquid bromine, no solvent, and the Lewis acid FeBr3 as a catalyst—a reaction occurs in which one bromine is substituted for a ring hydrogen. (Because iron reacts with Br2 to give FeBr3, iron filings can be used in place of FeBr3.)
What is the product of bromination of toluene?
Performing the bromination in water, the major product is the o-bromotoluene.
What happens when toluene reacts with Br2 in presence of FeBr3?
Toluene reacts with bromine in the presence of the light to give benzyl bromide, while in presence of FeBr3 it gives p-bromotoluene. Toluene reacts with bromine in the presence of the light to give benzyl bromide, while in presence of FeBr3 it gives p-bromotoluene.
Is FeBr3 a Lewis acid?
Like most metal halides, FeBr3 is a Lewis acid, i.e. an electron pair acceptor. Lewis acids have at least one empty orbital they can use to accept an electron pair.
What happens when benzoic acid is treated with Br2 in presence of FeBr3?
Benzoic acid is then brominated, Br2, FeBr3 to give meta- bromobenzoic acid.
How do you chlorinate a benzene ring?
Benzene reacts with chlorine or bromine in the presence of a catalyst, replacing one of the hydrogen atoms on the ring by a chlorine or bromine atom. The reactions happen at room temperature. The catalyst is either aluminum chloride (or aluminum bromide if you are reacting benzene with bromine) or iron.
What is the minor product likely to be formed when toluene is reacted with propyl chloride in the presence of AlCl3?
Benzene reacts with n-propyl chloride in presence of AlCl3/Δ to give isopropyl benzene.
Which catalyst is used in bromination of toluene?
The efficiency of the bromination of toluene derivatives has been improved significantly by utilising a combination of hydrogen peroxide (30%) and hydrogen bromide (40%) in a continuous-flow micro reactor. This catalyst and solvent-free reaction takes place by visible-light photocatalysis.
What happens when FeBr3 is added to Br2 toluene?
The FeBr3 catalyzes the reaction between toluene and Br2 to form ortho and para bromotoluene. The FeBr3 interacts with bromine to make it more electrophillic and able to react with the benzene ring of toluene. If there is no bromine left after the catalyst has been formed, no reaction will occur.
What happens when you add bromine to toluene?
As mentioned above, saturated hydrocarbons will only react with bromine under free radical conditions, meaning you have to add UV light. So simply adding some bromine to toluene won’t cause a reaction to occur. Cyclohexene will readily reacts with bromine (see Carey CH 6.15 and 6.16). Is toluene soluble in water? Toluene is not soluble in water.
What is the reaction between iron and bromine?
The iron and bromine must first react to form the catalyst (FeBr3) as the iron does not actually catalyze the reaction (this is known as in situ synthesis of the catalyst). The FeBr3 catalyzes the reaction between toluene and Br2 to form ortho and para bromotoluene.
What happens when benzene reacts with bromine?
Benzene reacts with chlorine or bromine in an electrophilic substitution reaction, but only in the presence of a catalyst. It reacts with some of the chlorine or bromine to form iron (III) chloride, FeCl3, or iron (III) bromide, FeBr3. Do aromatic compounds react with bromine?