Transition step

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Tara_Hekmati_3B
Posts: 28
Joined: Wed Sep 21, 2016 2:59 pm

Transition step

Postby Tara_Hekmati_3B » Mon Mar 06, 2017 4:42 pm

Is the slow step in electrophilic addition always the first step or the step with the highest activation energy barrier?
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Tara Ostad 1H
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Joined: Wed Sep 21, 2016 2:59 pm

Re: Transition step

Postby Tara Ostad 1H » Mon Mar 06, 2017 5:44 pm

TA Andy said that for electrophilic addition that the slow step is always the first step.
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Sophia Rawson 1C
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Joined: Wed Sep 21, 2016 2:58 pm

Re: Transition step

Postby Sophia Rawson 1C » Mon Mar 06, 2017 5:49 pm

yes the first step is always slower because it involves breaking a bond and forming a high energy intermediate whereas in the second it only has to break that intermediate and form a new lower energy bond.
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veeksha25
Posts: 29
Joined: Wed Sep 21, 2016 2:56 pm

Re: Transition step

Postby veeksha25 » Thu Mar 16, 2017 11:18 pm

But then if the first step's activation energy is lower than the second steps then why wouldn't it be the second step?
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