Question

Catalytic hydrogenation of the following compound produces saturated hydrocarbon(s). The number of stereoisomer(s) formed is
(Structure as given in the question)

• A. 1
• B. 2
• C. 3
• D. 4

Hint:

Each new chiral center formed during hydrogenation doubles the number of stereoisomers.

Answer 1

The Correct Option is C

Step 1: Understanding the structure.
The given molecule contains two double bonds with substituents that will create chiral centers upon hydrogenation. Each C=C bond is converted into a C–C bond, producing two new stereocenters.
Step 2: Calculating stereoisomers.
Number of stereocenters formed = 2.
Maximum stereoisomers = 2$^n$ = 2$^2$ = 4.
Because the molecule has no internal plane of symmetry after hydrogenation, no meso form is possible.
Step 3: Conclusion.
Thus, the number of possible stereoisomers is 4.