Engineering
Chemistry
Carbocation
Question


Which statement is incorrect about this reaction.

1,4- addition product is KCP (Kinetically controlled product)

TCP (Thermodynamically controlled product) is formed by 1,4-addition

Major product is formed by 1,2-addition.

TCP forms as major product.

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Solution

The reaction involves conjugate addition to an α,β-unsaturated carbonyl compound. The 1,2-addition product is the kinetic product (KCP), formed faster at lower temperatures. The 1,4-addition product is the thermodynamic product (TCP), more stable and major at equilibrium. Therefore, the statement "Major product is formed by 1,2-addition" is incorrect because the thermodynamically controlled 1,4-addition gives the major product.

Final Answer: Major product is formed by 1,2-addition.