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Chapter 10Organic Reaction Mechanisms, Part 1: Reactions Involving Additions 10.3 Electrophilic addition of water to alkenes and alkynes: hydration. Conversion of multiple bonds, such as a double or a triple bond, into other functional groups are usually achieved using addition reactions. The reaction of Request PDF | Addition Reactions | Alkene activation by an internal nucleophile that enables 'incompetent' alkenes to undergo halocyclization, via enforcingelectrophilic attack as they assist in carbocation and positive charge stabilization in the TS. Page 6. REACTIONS of ALKENES. OH. Carbene addition. Chapter 6: Reactions of Alkenes: Addition Reactions. 6.1: Hydrogenation of Alkenes The reaction takes places on the surface of the catalyst. Thus,. At higher temps, entropy dominates, and elimination reactions are favored. • So, we use lower temperatures when doing an addition reaction. Reactions, alkenes: 1. Addition of hydrogen (reduction). 2. Addition of halogens. 3. Addition of hydrogen halides. 4. Addition of sulfuric acid. Electrophilic and Concerted Addition Reactions from We show a general equation for an addition reaction with an alkene in Figure 10.01. Figure 10.01. Electrophilic addition reactions are an important class of reactions that allow Reaction of the C=C with E+ to give a carbocation (or another cationic. ADDITION REACTIONS. • Key words: Addition to alkenes and alkynes, markovnikov's rule, electrophilic and nucleophilic additions