Why is benzene susceptible to electrophilic attack?

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 C 2 attack of electrophile in pyrrole is most stable?

The reason behind it is the more number of resonating intermediate structure are possible to accommodate the positive charge when electrophile attacks on 2nd position (three resonating intermediate structures) that makes the intermediate carbocation more stable while if electrophile attacks on the 3rd position then …

What is meant by electrophilic attack?

An electrophilic substitution reaction is a chemical reaction in which the functional group attached to a compound is replaced by an electrophile. The displaced functional group is typically a hydrogen atom.

Why the electrophilic attack at the alpha position in pyrrole is preferred?

Whereas attack at the β-position produces an intermediate that can be described by only 2 resonance structures. Therefore, the intermediate formed by α attack is more stable and the activation energy leading to it will be reduced. Consequently, electrophilic attack at the α position in pyrrole is preferred.

Why benzene undergoes electrophilic substitution reaction whereas alkenes undergo addition reaction?

Benzene possess an unhybridised p-orbital containing one electron. The lateral overlap of theirp-orbitals produces 3 it bond. Due to delocalisation, strong it-bond is formed which makes the molecule stable. Therefore benzene undergoes electrophilic substitution reaction, whereas alkenes undergoes addition reaction.

What is electrophilic and nucleophilic attack?

Electrophilic substitutions involve displacement of a functional group by an electrophile (generally a hydrogen atom). Nucleophilic substitutions involve attack of a positively charged (or partially positively charged) atom or group by a nucleophile. Nucleophiles are species that can donate an electron pair.

Which position of pyrrole is more reactive towards electrophilic?

2-Position of pyrrole is more reactive towards electrophilic substitution than 3-position.