Chemistry - Hydrocarbon Question with Solution | TestHub
At a certain temperature, the percentage of monochlorinated products obtained for the following reaction are given:
For all questions, assume the reactivity ratio to be the same as in the above reactions.
The propagation step of monochlorination of an alkane involves the formation of a radical intermediate.
R–H + Cl R + H–Cl
The energy profile for the formation of a free radical is described as:
For the compound (X):
Which of the following is incorrect for the monochlorination of ?
Consider the reactivity order of chlorination as follows:
3°H : 2°H : 1°H
4.5 : 3.8 : 1
Options:
Answer:
Solution:
Question Explanation:
The question asks to identify the incorrect statement related to the monochlorination of 1,3,5-
trimethylcyclohexane.
Concept:
This question is based on free-radical halogenation and analysis of the possible monochlorinated
products.
Solution: From the given energy diagram
Reactivity order (approx.): Cl2 /hν
3° : 2° : 1° ≈ 4.5 : 3.8 : 1
For Chlorination 9 × 1 = 9 1° product =
6 × 3.8 = 22.8 2° product =
3 × 4.5 = 13.5 3° product =
Total = 45.3
Via intermediate (R), two products are obtained which are enantiomers is incorrect they are geometrical diastereomers