Benzene and Alkyl Benzene - Result Question 22
26. The reaction(s) leading to the formation of 1,3,5-trimethylbenzene is (are)
(2018 Adv.)
(a)
(b)
Show Answer
Answer:
Correct Answer: 26. (a, b, d)
Solution:
Reaction shown in option (a) is aldol condensation in the presence of conc. $\mathrm{H}_2 \mathrm{SO}_4$ at high temperature.
In summerised way the formation of mesitylene through this can be visualised as
Reaction given in option (b) is simple polymerisation (trimerisation) reaction of alkyne i.e.,
$\mathrm{CH}_3-\mathrm{C} \equiv \mathrm{CH}$ when passed through heated iron tube at $873$ $ K$ then mesitylene is formed as
This reaction is also called aromatisation.
(1) and (2) reactions of option (c) combined to give haloform reaction while (3) reaction given in this option is decarboxylation reaction i.e.,
BETA
