Chemistry 2223B Lecture Notes - Ozonide, Ozonolysis, Sodium Amide
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Chemistry 2213a fall 2012 western university. Reactions of alkenes (and alkynes: introduction to alkene reactions. The main reactions of alkenes are addition reactions, where some ab species reacts to break the bond and form two new bonds. Addition reactions are usually exothermic and occur spontaneously at room temperature. To fully understand the structure and stereochemistry of the products formed, we need to look at the sequence of steps that occur as the reaction proceeds, i. e. the reaction mechanism. Ccabccabreactions of alkenes (and alkynes) 2: mechanism of the electrophilic addition reaction. Electrophilic addition is the mechanism by which the addition of many reagents across the double bond occurs. In chapter 4 of the text, we saw that bonds have electron density on both sides of the bond (the two faces of the alkene). The bond is reactive and will attract electrophiles, which are electron-seeking reagents. The addition of ab to a bond proceeds well when ab is ionized (behaves as.