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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.

Product P is

A

B

C

D

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

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 :

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

If ethanol containing EtOD is used as solvent , then deuterium exchange take place in E1cB mechanism . Why ?

What is meant by E_1 and E_2 reactions ? Discuss the two mechanisms by taking suitable examples.

The acidic character of alcohols is due the polar nature of O-H bond. An e releasing group (- CH_(3) -C_(2)H_(5)) increases e density on oxygen thus decreasing the acidity while e withdrawing group increases the acidity. Which is the strongest acid among:

Nucleophilic substitution reactions generally expressed as Nu^(-) +R-L rarr R-Nu +L^(-) Where Nu^(-) rarr Nucleophile , R-L rarr substrate, L rarr leaving group The best leaving groups are those that become the most stable ions after they depart. since most leaving group leave as a negatibe ion, the best leaving groups are those ions that stabilize a negative charge most effectively. A good leaving group should be (a) electron-withdrawing to polarize the carbon (b) stable once it has left (not a strong base) (c) polaristable to maintain partial bonding with the carbon in the transition state (both S_(N)1 and S_(N)2) . This bonding helps to stabilise the transition state and reduces the activation energy. (I) CI^(-) (II) CH_(3)O^(-) (III) CH_(3)S^(-) (IV) I^(-) The correct order of increasing leaving group capability of above anions

Nucleophilic substitution reactions generally expressed as Nu^(-) +R-L rarr R-Nu +L^(-) Where Nu^(-) rarr Nucleophile , R-L rarr substrate, L rarr leaving group The best leaving groups are those that become the most stable ions after they depart. since most leaving group leave as a negatibe ion, the best leaving groups are those ions that stabilize a negative charge most effectively. A good leaving group should be (a) electron-withdrawing to polarize the carbon (b) stable once it has left (not a strong base) (c) polaristable to maintain partial bonding with the carbon in the transition state (both S_(N)1 and S_(N)2) . This bonding helps to stabilise the transition state and reduces the activation energy. Among the following which is feasible?

RESONANCE ENGLISH-ORGANIC REACTION MECHANISMS-IV-APSP PART-3
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  10. Which of the following reaction has the correct major product .

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  11. Which of the following statements is/are correct for alkyl halide ?

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  13. The order of following reaction is :

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  14. Total number of alkenes obtained by dehydration of 3,4-diethylhexan-2-...

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  16. The number of products (stereoisomers) formed in the following reactio...

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

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

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

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  20. Match List I (Reaction) with List II (Type of reaction ) and select th...

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