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The elimination reactions mainly involve...

The elimination reactions mainly involve three mechanism E1,E2 and E1cB. If the leaving group departs before `beta`-proton (`H^Theta` ion) then it is E1 mechanism. If proton is taken off first before leaving group it is E1cB mechanism.The pure E2 involves both `beta`-Hydrogen and leaving group departing simutaneously. If acidity of `beta`-Hydrogen increases and leaving group ability decreases then E1cB mechanism increases.

The alkene formed as a major product in the above elimination reaction is

A

`CH_2=CH_2`

B

`CH_3-CH_2-CH=CH_2`

C

D

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The correct Answer is:
A
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The elimination reactions mainly involve three mechanism E1,E2 and E1cB. If the leaving group departs before beta -proton ( H^Theta ion) then it is E1 mechanism. If proton is taken off first before leaving group it is E1cB mechanism.The pure E2 involves both beta -Hydrogen and leaving group departing simutaneously. If acidity of beta -Hydrogen increases and leaving group ability decreases then E1cB mechanism increases. Product P is

The elimination reactions mainly involve three mechanism E1,E2 and E1cB. If the leaving group departs before beta -proton ( H^t=Theta ion) then it is E1 mechanism. If proton is taken off first before leaving group it is E1cB mechanism.The pure E2 involves both beta -Hydrogen and leaving group departing simutaneously. If acidity of beta -Hydrogen increases and leaving group ability decreases then E1cB mechanism increases. Which of the following substrate will undergo fastest reaction through E1cB route

The order of leaving group ability is :

What do you understand by elimination reactions ? Discuss the mechanism of E_1 and E_2 reactions.

If the mechanism is E1cB then the possible products will be :

Arrange the given species in the increasing order of Leaving group ability

The correct order of the ability of the leaving group is

What are the essential conditions for any reaction to show E1cB mechanism ?

For dehyetohalogenation, the order of reactivity of alkyl halides considering E1 mechanism is

RESONANCE ENGLISH-ORGANIC REACTION MECHANISMS-IV-APSP PART-3
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  11. Which of the following statements is/are correct for alkyl halide ?

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  18. The elimination reactions mainly involve three mechanism E1,E2 and E1c...

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