Question of the Day

In addition of halogen (Bromine) to an alkene, how can we isolate a bromonium in the reaction?

A bromo-carbenium ion intermediate may be predominant instead of vicinyl dibromide if the alkene has a cation-stabilizing substituent like phenyl group. There is an example of the isolation of the bromonium ion.

increasing concentration of bromide ion decreasing concentration of bromide ion alkene with cation stabilising groups alkene with less electrophilic centre A and C