CHEM 203 Lecture Notes - Lecture 10: Halonium Ion, Bayerischer Rundfunk, Bromine
Document Summary
Principle: all the reactions seen so far involve carbocations, therefore, in all such reactions rearrangements of the carbocation intermediates are possible. Possible additions to the system of alkenes that do not involve carbocation intermediates. Reaction of alkenes with molecular halogens (cl2, br2, sometimes i2, but not f2 see below): X = cl, br, sometimes i notice how the above reaction reflects the general pattern of reactivity of olefins (notes of sept 12) Description of the above reaction as the halogenation (chlorination, bromination, iodination, ) of an alkene. Description of the product as the above reaction as a vicinal dihalide (dichloride, dibromide, diiodide ) Vicinal dihalides as technologically important products of the large-volume chemical industry. Violent, exothermic reaction of f2 with alkenes (and organic matter in general) due to the extreme reactivity of f2 toward carbon-based compounds, as a consequence of which the fluorination of alkenes is not a reaction of interest.
