CHEM 2211 1nd Edition Lecture 21Outline of Last Lecture I. Alkene reactions cont. Outline of Current Lecture I. Alkene reactions finished Current LectureThe 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 ORCH=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=CR2These 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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