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which reaction is faster and why ?

13 Answers

11
Anirudh Narayanan ·

SN2 due to low steric hindrance on the carbon [1]

1
big looser ......... ·

hey buddy... its SN1 & i want to know why ?

11
Anirudh Narayanan ·

Printing mistake?

1
big looser ......... ·

it was told by my teacher and i forgot what he said...........

11
Anirudh Narayanan ·

I don't think the carbocation formed is stable. Even a hydride shift won't do it too much good. Do you know the product?

1357
Manish Shankar ·

SN1 because of the formation of allylic carbocation which is stablized by resonance

11
Anirudh Narayanan ·

Could you show the resonating structures please?

1357
Manish Shankar ·

1
big looser ......... ·

thanks brother

11
Anirudh Narayanan ·

Oh no. I thought the line leading out from the 4th carbon from the left was another CH2Br group. Thanx bhaiyyah. [1]

1
big looser ......... ·


sorry guys ,, actually i have asked wrong question
i was told that in the mechanism product 2 is faster formed....
can anybody tell me the reason ?????
i am extremely sorry for my mistake

1
greatvishal swami ·

reacn 2's carbocation is 2° allylic carbocation thats why is more stable than reaction 1's 1° allylic carbocation

33
Abhishek Priyam ·

I think it will depend on solvents and relative rates as I is being formed via 2 paths and II via a single path and we have to decide which will dominate..and whether the stability of carbocation increases rate of reaction so as to overtake the sum of two individual paths...That depends on how much is it stable...

But this is chemistry.. If U gives I is formed at faster rate or II is faster both can be wrong it will depend on examiner to decide which is correct and whatever he says is Brahmalakir

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