The Number of Intermediates for Electrophilic Addition

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Yoon Lee 2A
Posts: 22
Joined: Fri Sep 25, 2015 3:00 am

The Number of Intermediates for Electrophilic Addition

Postby Yoon Lee 2A » Thu Mar 10, 2016 9:43 pm

For the reaction profile of an electrophilic addition reaction, there are two peaks for the two steps/two transition states, and one trough in the graph. I thought this single trough means there is only one intermediate, but for electrophilic addition, there are always two intermediates? Why does this seem inconsistent with the reaction profile graph?

Thank you in advanced!

VictoriaRoderick_3A
Posts: 42
Joined: Fri Sep 25, 2015 3:00 am

Re: The Number of Intermediates for Electrophilic Addition

Postby VictoriaRoderick_3A » Thu Mar 10, 2016 10:37 pm

Dr. Lavelle said that anything between the reactant and product is considered an intermediate. That is how I approach it.

Ronald Yang 2F
Posts: 86
Joined: Fri Sep 25, 2015 3:00 am

Re: The Number of Intermediates for Electrophilic Addition

Postby Ronald Yang 2F » Fri Mar 11, 2016 10:31 pm

It's because two intermediates exist at that "intermediate" phase. Together, they make up that amount of energy considered "intermediates" on the reaction profile.

Tom Notcovich 3B
Posts: 13
Joined: Wed Sep 21, 2016 2:58 pm

Re: The Number of Intermediates for Electrophilic Addition

Postby Tom Notcovich 3B » Sat Feb 25, 2017 2:55 pm

When considering electrophilic addition reactions it is important to distinguish between reactants that are in transitions phases and intermediated. Those shown in transition phases are in the process of forming and breaking bonds while intermediates a substances that are formed in one reaction as the product and are later used up in a following one as the reactant.


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