What Is Cyclic Halonium Ion

A halonium ion is any onium ion containing a halogen atom carrying a positive charge. … The 3-membered cyclic variety commonly proposed as intermediates in electrophilic halogenation may be called haliranium ions, using the Hantzsch-Widman nomenclature system.

How cyclic Bromonium ion is formed?

The π electrons act as a nucleophile, attacking the bromine, displacing a bromide ion but forming a cationic cyclic bromonium ion as an intermediate.

What is Bromonium ion?

Bromonium ions are cyclic intermediates in electrophilic brominations of C = C double bonds resulting in stereospecific anti additions. Bromonium ions are planar bridging the original π bond of the alkene or alkyne.