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  • a)
    Reaction A give two products while B give one

  • b)
    Both give single product

  • c)
    Reaction B give two products while A give one 

  • d)
    Both give two products

Correct answer is option 'B'. Can you explain this answer?
Verified Answer
a)Reaction A give two products while B give oneb)Both give single prod...
The given reactions involve the partial hydrogenation of an alkyne.
Reaction A: H2, Pd/BaSO4​ (Lindlar's Catalyst)
Lindlar's catalyst is used to hydrogenate alkynes to cis-alkenes. It adds hydrogen to the alkyne in a syn addition manner, producing a cis-alkene. For the given compound, the alkyne would be converted to a cis-alkene.
Reaction B: Na, Liquid NH3​ (Birch Reduction)
The Birch reduction reduces alkynes to trans-alkenes via an anti addition of hydrogen. For the given compound, the alkyne would be converted to a trans-alkene.
Given the molecular structure in the image, let's analyze the products of each reaction:
  1. Lindlar's Catalyst (Reaction A):
    • Converts the alkyne to a cis-alkene.
    • The alkyne shown will be converted to a single cis-alkene product because the reaction is stereoselective.
  2. Birch Reduction (Reaction B):
    • Converts the alkyne to a trans-alkene.
    • The alkyne shown will be converted to a single trans-alkene product because the reaction is stereoselective.
Conclusion:
Both reactions A and B give single products. Therefore, the correct answer is:
Option B: Both give single product
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a)Reaction A give two products while B give oneb)Both give single prod...
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a)Reaction A give two products while B give oneb)Both give single prod...
B will have entiomers
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a)Reaction A give two products while B give oneb)Both give single productc)Reaction B give two products while A give oned)Both give two productsCorrect answer is option 'B'. Can you explain this answer?
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