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CH3C-=C CH3underset(CH3CH2OH)overset(Na)...

`CH_3C-=C CH_3underset(CH_3CH_2OH)overset(Na)toP`
Identify the product.

A

cis-but-2-ene

B

trans-but-2-ene

C

an equimolar mixture of (1) and (2)

D

Unequal amounts of (1) and (2)

Text Solution

Verified by Experts

The correct Answer is:
B
Active metal (Na) reduction of an alkyne in a protic solvent `(C_2H_2OH)` leads to anti-addition on account of the formation of vinyl radical carbanion.
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R SHARMA-ALKYNES-Follow-up Test 5
  1. Which of the following catalysts or chemical reagents are emplyted for...

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  2. Which of the following alkynes is not normally reduced to alkene by so...

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  3. Which of the catalysts should be used to hydrogenate but-2-yne into bu...

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  4. Which of the following is correct?

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  5. CH3C-=C CH3underset(CH3CH2OH)overset(Na)toP Identify the product.

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  6. When but-1-yne reacts with two equivalents of HBr, the major product i...

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  7. When but-1-yne reacts with two equivalents of HBr, in the presence of ...

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  8. Which of the following statements is correct?

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  9. Which of the following alkynes is insoluble in conc. H2SO4?

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  10. The product (s) obtained by the oxymercuration (HgSO4+aq.H2SO4) of but...

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  11. Which of the following reagents would convert but-1-yne into but-2-yne...

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  12. CH3C-=Choverset(NaNH2)toAoverset(D2O)toB Identify the product B.

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  13. Which of the following alkynes will not reacts with ammoniacal CuCl?

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  14. Pent-2-yne will yield on reductive ozonolysis.

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  15. Hept-3-yne reacts with to form a diketone

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  16. Like acetylene, the homologues of acetylene can also polymerize. Which...

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  17. Which of the followinig alkynes will produce isobutyric acid and CO2 o...

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  18. Which of the following reagents can distinguish between propene and pr...

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  19. Identify the product.

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