The very best proposal We've for what is happening is formation of the cyclic halonium ion, and that is a three-membered ring bearing a constructive formal charge on the halogen. – addition on an alkene, it’s popular to draw The 2 new C-halogen bonds inside the airplane in the web https://bromazolam-what-is-it71470.blogoscience.com/44079589/5-essential-elements-for-is-bromazolam-a-controlled-substance