CHEM 210 Reactions Test Questions and Answers All Correct

CHEM 210 Reactions Test Questions and Answers All Correct Describe the mechanism for the electrophilic addition of a strong acid. - Answer-Step 1) An alkene grabs a hydrogen off of a strong acid, forming a carbocation intermediate. Step 2) The conjugate base of the acid (an anion now) bonds to the open shell carbocation What is the regioselectivity of electrophilic addition reactions? - Answer-Markovnikov What is Markovnikov regioselectivity? - Answer-States that the major product is determined by whatever the most stable carbocation intermediate is (resonance > tertiary > secondary > primary) Describe the mechanism for the electrophilic addition of a weak acid. - Answer-Prestep: acid catalyst will generally be used to protonate the weak acid reagent (but will technically protonate the strongest base) Step 1) strongest acid available protonates the alkene Step 2) the conjugate base of that acid bonds to the carbocation intermediate Step 3) deprotonation to reform acid and to give neutral product What is the stereochemistry of an electrophilic addition product? - Answer-Can be syn or anti because the product is formed through a carbocation intermediate