alkene rxns exam 3

Question 1

hydroboration/oxidation

Answer 1

1. BH3
   2.H2O2, OH-

-syn addition
-non mark

final product: add H and OH

Question 2

oxymercuration/
demercuration

Answer 2

1. Hg(OAc)2, H2O
2. NaBH4

-mark

oxymercuration final product: add OH and HgOAc

demercuration final product: add H and OH

Question 3

halohydrin formation

Answer 3

1. Br-Br
2. H2O
3. H+

-anti addition
-mark like

final product: Br and OH

Question 4

hydrogenation

Answer 4

alkene -> alkane

1. H2/Pd, Pt or Ni

-syn addition

final product: H and H