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How Do We Decide between the SN1 and SN2 Mechanisms

In the above ...

Question

In the above graph the bond breaking step is .

A

TS1

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B

TS2

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C

I

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D

NONE

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Solution

The correct option is A TS1
By seeing the graph we can know that it is $S_{N} 1$ reaction energy diagram. $S_{N} 1$ reaction proceeds in two steps first step is bond breaking and carbocation intermediate is formed and second step foramtion on new bond. So the first step is TS1 and it indicates bond breaking step.

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