Question

In the following sequence of reaction, the major products B and C respectively are :

• A.
• B.
• C.
• D.

Answer 1

The Correct Option is A

To solve this sequence of reactions, let's analyze each step:

1. First Reaction:

The substrate is a cyclic compound with chlorine and bromine substituents. It reacts with sodium (Na) in the presence of diethyl ether (Et₂O), which is typically used for a Wurtz reaction. This reaction will form an intermediate where two halogen atoms are removed, and a new carbon-carbon bond is formed, resulting in a ring structure with two additional carbon atoms.

1. Second Reaction:

The intermediate compound A is then treated with magnesium (Mg) in diethyl ether to form a Grignard reagent. The Grignard reagent is represented as RMgX where R is the organic group.

1. Third Reaction:

The Grignard reagent reacts with D₂O (deuterium oxide) to replace the MgBr part with a deuterium atom (D), resulting in compound B, which is a deuterated hydrocarbon.

1. Fourth Reaction:

The compound A also reacts simultaneously via CoF₂-catalyzed reaction to form compound C. CoF₂ is used as a catalyst in some polymerization reactions, hinting that a new product formation may involve a fluorinated derivative or similar activity.

The reactions above indicate that compound B is the deuterated cyclopropane and compound C may involve some modifications due to CoF₂. Based on the given options and the typical reactivities, the product matches the structure described by:

Thus, the major products B and C are identified as the ones shown in the correct answer option above.

Answer 2

Thus the correct answer is Option 1.