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Which one is most easily dehydrohalogena...


Which one is most easily dehydrohalogenated ?

A

I

B

II

C

III

D

All with same ease

Text Solution

Verified by Experts

The correct Answer is:
A
The case of dehydrohalogenation depends on the stability of the intermediate carbocation and the stability of the product . In (I) the carbocation is allylic and the product is benzene ,both are most stable. Them in (II) where the carbocation is again allylic and the product is again benzene but with reamangement . In (III) the intermediate is extremely unstable vinyl carbocation.
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NARAYNA-HALOALKANE AND HALOARENES-EXERCISE - I (C.W)
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  2. The products of reaction of alcoholic silver nitrite with enthyl bromi...

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  3. Ethylidene chloride on treatement with aq. KOH gives

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  4. The order of reactivities of the following alkyl halides for a S(N^(2)...

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  5. CH3OHoverset(PI3)rarr(A)overset(KCN)rarr(B)overset("Hydrolysis")rarr(C...

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  6. SN^1 reaction is favoured by

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  7. Which among the following alkane of formula (C6H14) gives five types o...

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  8. Which of the following statement is correct about C2H5Br ?

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  9. R-X+NaOHtoROH+NaX The above reaction is classified as

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  10. The dipole moment of CH3X (where X is a halogen) follows the order

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  11. Which of the following statement is false regarding SN2 reaction shown...

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  12. Identify the set of reagents // reaction conditions 'X' and 'Y' in the...

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  13. In the given reaction sequence: [X] will be

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  14. underset((A))(C4H8Cl2)underset("Heat")overset(alc.KOH)rarrBoverset(HgS...

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  15. Which one is most easily dehydrohalogenated ?

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  16. The above structural formula refers to

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  17. Which of the following will react with water?

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  18. CHCl3 on oxidation by air in presence of light gives

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  19. The final product formed by distilling ethyl alcohol with excess of Cl...

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  20. Chloroform is stored in dark coloured bottles because it is oxidized i...

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