CHEM 0310 Lecture Notes - Lecture 12: Electrophilic Addition, Syn And Anti Addition, Steric Effects
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The carbon-carbon pi bond is relatively weak, and the chemistry of alkenes is governed largely by its reactions. The most common transformation is addition of a reagent a-b to give a saturated compound in this process, the a-b bond is broken and a and b form single bonds to carbon. Additions to alkenes should proceed to products with release of energy (negative delat h) The simplest reaction of the double bond is its saturation with hydrogen. The process requires a catalyst, which may be either heterogeneous or homogeneous either insoluble or soluble. The catalysts frequently are insoluble materials such as palladium, platinum, and nickel. The major function of the catalyst is the activation of hydrogen to generate metal-bound hydrogen on the catalyst surface. An important feature of addition reactions to alkenes is their potential stereochemistry addition from one side of the double bond is called syn addition while from opposite sides it is called anti.
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