Describe the mechanism for bromination across a double bond
This mechanism is an example of an electrophillic addition reaction.
Firstly consider the approach of a Br2, and how that bond will develop an induced dipole as a result of the high electron density on the double bond.
Use curly arrows to show how the double bond 'attacks' the partially positive bromine, and how this causes the Br-Br bond to break heterolytically. Overall we have formed a new C-Br bond and a Br anion. But, we must remember to always conserve charge- therefore remembering the carbocation generated.
The final step involves the bromine anion attacking the carbocation, forming the dibromo product.
LO
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