Which benzene is more reactive towards electrophilic substitution reaction?

The compound which is most reactive towards the electrophilic substitution is the Methyl group. Activating groups attached to the benzene ring increase the reactivity of benzene towards electrophilic substitution.

What is the reactivity order of electrophilic substitution reaction?

General order of reactivity towards electrophilic substitution reaction: Aniline > Phenol > Anisole > Acetanilide > Toluene > Chlorobenzene > Fluorobenzene > Benzoic acid > Benzaldehyde > Nitrobenzene.

What happens when halogen reacts with benzene?

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. It reacts with some of the chlorine or bromine to form iron(III) chloride, FeCl3, or iron(III) bromide, FeBr3.

Which will react with a halogen by an electrophilic substitution mechanism?

Benzene reacts with chlorine or bromine in an electrophilic substitution reaction, but only in the presence of a catalyst. These compounds act as the catalyst and behave exactly like aluminum chloride in these reactions.

Which electrophilic reaction is most reactive?

Therefore, o-hydroxy toluene is most reactive towards electrophilic reagent.

Which is more reactive in electrophilic substitution reaction benzene or chlorobenzene?

Chlorobenzene is less reactive than benzene towards electrophilic substitution reaction.

Why does benzene give electrophilic substitution reaction?

Benzene is a planar molecule having delocalized electrons above and below the plane of the ring. Hence, it is electron-rich. As a result, it is highly attractive to electron-deficient species i.e., electrophiles. Therefore, it undergoes electrophilic substitution reactions very easily.

Why electrophilic substitution reaction occurs slowly in nitrobenzene than benzene?

Because the benzene acts as a nucleophile in electrophilic aromatic substitution, substituents that make the benzene more electron-rich can accelerate the reaction. Nitrobenzene, C6H5NO2, undergoes the reaction millions of times more slowly.

Which is the most reactive in electrophilic substitution structure?

−NH2 group is the most activating group which is present in aniline (C6H5−NH2) hence it is the most reactive towards electrophilic substitution reaction.

How do halogens affect the reactivity of benzene?

The reactivity of halogens on benzene follows the order of electro negativity. As the size of the halogens increases, the reactivity of the ring decreases. It also depends on the resonance effect of donating or activating. Resonance effect means delocalisation of pi electrons between the rings and substitutents.

Why is the benzene ring deactivated in electrophilic substitution reaction?

Due to –I effect (electron withdrawing nature) of halogen, benzene ring gets somewhat deactivated towards electrophilic substitution reaction. Due to its various resonating structures, there’s an excess of electron or negative charge over ortho- and para- positions of the ring than the meta- position.

Why are Haloarenes O and P directive towards electrophilic substitution reaction?

Due to its various resonating structures, there’s an excess of electron or negative charge over ortho- and para- positions of the ring than the meta- position. Thus, haloarenes are o- and p- directive towards electrophilic substitution reaction.

Why is chlorobenzene electrophile but not benzene?

Electrophile is an electron deficient species, so the most reactive towards an electrophilic attack will be electron rich. In chlorobenzene, lone pair of Chlorine is delocalised in benzene ring, thus making it unavailable for electrophile. In Benzyl alcohol, O-H bond is polar, thus it can donate its proton.