To determine the major product of the given reaction, we need to analyze the structure and reactivity of the compound involved. The question provides us with the compound 6-Phenylhepta-2,4-diene.
Step 1: Analyze the structure: The compound is a conjugated diene with phenyl substitution at position 6. It has the structure:
Hepta indicates a seven-carbon chain.
2,4-diene implies double bonds at carbons 2 and 4.
Phenyl group at position 6.
Step 2: Electrophilic addition reaction: In electrophilic additions, conjugated dienes like hepta-2,4-diene can undergo 1,2-addition (kinetic control) or 1,4-addition (thermodynamic control).
Step 3: Identify stability: Due to conjugation, electrons can delocalize, making certain products more stable. The reaction typically forms a product where the double bonds remain conjugated, as seen with 6-Phenylhepta-2,4-diene. Conjugated double bonds stabilize the molecule through resonance.
Option
Product Description
2-Phenylhepta-2,4-diene
Phenyl group at position 2, different from input structure
6-Phenylhepta-3,5-diene
Position of double bonds is shifted, may not be favored
6-Phenylhepta-2,4-diene
Original compound, conjugated diene structure, favored by resonance
2-Phenylhepta-2,5-diene
Non-conjugated, phenyl at position 2
Conclusion: The most stable, resonance-stabilized structure is 6-Phenylhepta-2,4-diene, which is the major product.
