Reaction Mechanism in More Detail

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Reaction Mechanism in More Detail

Postby Alejandra_Vasquez_1B » Sun Feb 26, 2017 8:48 pm

When dealing with an electrophilic addition reaction, is the goal to breakup double bonds? In the course reader, the example of HBr and 2-Butene, says to break up the double bond. Is that always going to be the case for other reactions? Is it best to try and get rid of the double bond?

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Re: Reaction Mechanism in More Detail

Postby Chem_Mod » Sun Feb 26, 2017 9:22 pm

The reason why the double bond is being broken is because it is an electrophile, and the C=C bond is at a higher relative energy than a C-C bond. So this reaction would go downhill from a double bond to a single bond, and the double bond is the site to do it.

As for more generally electrophilic addition, it is not always the case that you have a double bond. It may be, for instance, a triple bond.

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