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Which of the following reagents would co...

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

A

ammoniacal `CuCl`

B

`(NaNH_2)/(NH_3(1))`

C

ammoniacal `AgNO_3`

D

Ethanolic `KOH`, heat

Text Solution

Verified by Experts

The correct Answer is:
D
Acetylene homologues isomerize when heated with ethanolic KOH, the tripe bond moving towards the centre of the chain:
`CH_3CH_2C-=CHunderset(KOH)overset("Ehanolic")to[CH_3CH=C=CH_2]toCH_3C-=CCH_3`
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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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