Electrophilic addition reaction of HBr and Propene

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Jose_Arambulo_2I
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Electrophilic addition reaction of HBr and Propene

Postby Jose_Arambulo_2I » Wed Mar 01, 2017 12:45 am

In the first step of this reaction mechanism, does the hydrogen have to form a bond with carbon 3? Because I don't see why it couldn't also do the same with carbon 2 instead. The reaction can be found on pg 152 in the organic textbook.

Chem_Mod
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Re: Electrophilic addition reaction of HBr and Propene

Postby Chem_Mod » Wed Mar 01, 2017 12:27 pm

Yes, it could, but for reasons we haven't discussed yet the hydrogen will almost always form a bond with the terminal or end carbon. This puts the positive charge on the more substituted secondary carbon, which is more stable.

Patrick Ricaflanca 2H
Posts: 21
Joined: Sat Jul 09, 2016 3:00 am

Re: Electrophilic addition reaction of HBr and Propene

Postby Patrick Ricaflanca 2H » Wed Mar 01, 2017 11:03 pm

I was also thinking the same thing: whether it can be written as CH3-CHBr-CH3 as opposed to CH3-CH2-CH2Br.


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