Question

The major product(s) obtained in the following reaction is/are :

A.

B.

C.

D.

Answer 1

. Generally ozonolysis is used to test the presence of unsaturation in the organic compounds and by using ozonolysis we can find the position of the double bond and number of double bonds in the given organic compound.

Complete step by step answer:
- In the question it is given that 1-bromo-3-cyclohexene reacts with a base and later reacts with ozone reagent.
- We have to find the major product after the completion of the given reaction.
- The given reaction is as follows.

- There are two types of reactions involved in the given reaction, the first chemical reaction is as follows.

- In the first chemical reaction the base is going to do dehydrohalogenation and forms a compound having two unsaturation centers in the structure.
- In the first chemical reaction the formed compound A reacts with ozone in presence of dimethyl sulphide solvent and the chemical reaction is as follows.

- The above reaction is an example for reductive ozonolysis and produces two compounds as the products.
- Therefore the major products formed from the given reactions are as follows.

So, the correct answer is “Option B”.

Note: Ozonolysis of the compound produced after dehydrohalogenation forms two compounds. Ozone reacts with the compound A at unsaturation centers and forms a respective ozonide and later cleavage of the ozonide produces two compounds as the products containing aldehyde groups in their structures.