Benzene reacts with bromine in the presence of an aluminium bromide catalyst, $$\(\mathrm{AlBr}_{3}\)$$, to form bromobenzene. This is a substitution reaction. No addition reaction takes place. Explain why no addition reaction takes place. $$\(\mathrm{AlBr}_{3}\)$$ reacts with bromine to generate an electrophile, $$\(\mathrm{Br}^{+}\)$$.
Exam No：9701_s20_qp_43 Year：2020 Question No：5(a)(i)
Answer:
The substitution product is stabilised by delocalisation of (6) \(\pi\)-electrons
OR
The addition product is not stabilised by delocalisation of \((6) \pi\)-electrons [1]
OR
The addition product is not stabilised by delocalisation of \((6) \pi\)-electrons [1]
Knowledge points:
30.1.2.2 with regards to the effect of delocalisation (aromatic stabilisation) of electrons in arenes to explain the predomination of substitution over addition
Solution:
Download APP for more features
1. Tons of answers.
2. Smarter Al tools enhance your learning journey.
IOS
Download
Download
Android
Download
Download
Google Play
Download
Download