Question

The major product Y in the following reaction scheme is

• A.
• B.
• C.
• D.

Answer 1

The Correct Option is B

The given reaction scheme involves two steps to find the major product Y.

Step 1: Reaction of Pyridine with HBr
Pyridine reacts with hydrobromic acid (HBr) to form pyridinium bromide, which is an organic salt denoted as X.

Step 2: Formation of Product Y
The compound X (pyridinium bromide) reacts with trans-stilbene in the presence of bromine (Br₂) and acetic acid (AcOH) to form the dibromide derivative as the major product Y.

Product Analysis:
The addition of bromine across the double bond of trans-stilbene leads to the formation of the major product. The correct structure of Y matches the following option:

Conclusion:
The major product Y in the given reaction scheme is the dibromide derivative of trans-stilbene, shown in the correct answer option.