UGA CHEM 2211 - Alkene Reactions IV (2 pages)

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Alkene Reactions IV

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Alkene Reactions IV


Lecture number:
Lecture Note
University of Georgia
Chem 2211 - Mod Organic Chem I
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CHEM 2211 1nd Edition Lecture 21 Outline of Last Lecture I Alkene reactions cont Outline of Current Lecture I Alkene reactions finished Current Lecture The addition of peroxyacid to an alkene An alkene can be converted to an epoxide by a peroxyacid o An epoxide is an ether in which the O is in a three membered ring o Peroxyacid is a carboxylic acid with an extra oxygen The whole reaction is a transfer of the oxygen from the peroxyacid to the alkene O O O RCH CHR R C OOH RCH CHR R C OH The addition of Ozone to an Alkene This addition is known as ozonolysis An alkene is treated with O3 at low temperatures This causes the sigma and pie bonds of the double bonded Carbons to break The carbons separate o Then bond to oxygens with double bonds R2C CR2 ozonolysis R2C O O CR2 These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Ozonolysis is an example of oxidative cleavage Oxidative cleavage An oxidation reaction that cleaves the reactants into pieces The addition of hydrogen to an alkene The addition of Hydrogen to an alkene produces an alkane The addition requires a catalyst o Has to be a metal catalyst o Most common used is palladium on carbon pd C The addition of hydrogen is known as a reduction reaction o This is because it increases the number of C H bonds o And decreases the number of C O C N or C X bonds Also known as hydrogenation Example CH3 CH3 H2

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