CHM247H1 Lecture : CHM 247 ALL ABOUT Alkenes.pdf
Document Summary
Linoleic and linolenic acid are essential fatty acids found in whole milk. Dehydration of alcohols (for secondary or tertiary alcohols); follows e1 mechanism. How do alkenes react? (remember: all reactivity is a result of electron flow) Occurs to make a more stable carbocation. Uses more energy but if it creates a more stable carbocation it will happen (transition states are high-energy anyhow) Draw a mechanism to explain the major product in the reaction show below: Electrophilic addition reactions proceed by way of the more stable carbocation intermediate. Water (h2o) is added to one face of the double bond (syn addition: reaction is stereoselective and regiospecific. H is added to the more substituted carbon and oh is added to the less substituted carbon (due to steric crowding, borane will add to the less substituted carbon before being replaced with oh: hg(oac)2, h2o/thf2.
