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When but-1-yne reacts with two equivalen...

When but-1-yne reacts with two equivalents of `HBr`, in the presence of a peroxide, the mojor product is

A

`CH_2CH_2CH_2CHBr_2`

B

`CH_(3)CH_(2)underset(Br)underset(|)(C)Hunderset(Br)underset(|)(C)H_(2)`

C

`CH_(3)underset(Br)underset(|)(C)Hunderset(Br)underset(|)(C)HCH_(2)`

D

`CH_3CH_2CBr_2CH_3`

Text Solution

Verified by Experts

The correct Answer is:
A

It is an anti-Markovnikov's radical addition.
`CH_3CH_2C-=Choverset(HBr)toCH_3CH_2CH=CHBr`
A halogen atom destabilized a carbon free radical to which it is bonded. Hence, Br adds in the second step as shown.
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R SHARMA-ALKYNES-Follow-up Test 5
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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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