Carboxylic Acids and their Derivatives 2 Question 8
8. Different possible thermal decomposition pathways for peroxyesters are shown below. Match each pathway from Column $t$ I with an appropriate structure from Column II and select the correct answer using the code given below the lists.
| Column I | Column II | ||||
|---|---|---|---|---|---|
| P. | Pathway $P$ | 1. | |||
| Q. | Pathway $Q$ | 2. | |||
| R. | Pathway $R$ | 3. | |||
| S. | Pathway $S$ | 4. |
Codes
| P | Q | R | S | |
|---|---|---|---|---|
| (a) | 1 | 3 | 4 | 2 |
| (b) | 2 | 4 | 3 | 1 |
| (c) | 4 | 1 | 2 | 3 |
| (d) 3 | 2 | 1 | 4 |
Show Answer
Answer:
Correct Answer: 8. (a)
Solution:
- PLAN his problem can be solved by usin the stability of radical obtained after fra mentation of peroxyester.
Allylic radical are more stable than alkyl radical, so when there is a possibility of formation of allyl radical, it will undergo fragmentation through formation of allyl radical. i.e. fragmentation produces stable radical.
On the basis of stability of radical, fragmentation can be done as
