Allenes

Question 1

HBr

Roor

Answer 1

Brakes double bond and adds Br to least substituted position

Question 2

HBr

Answer 2

Breaks double bond and adds Br to most substituted postition

Question 3

1) Hg(OAc)2, H2O

2) NaBH4

Answer 3

Breaks double bond and adds an OH to most substituted position

Question 4

1) BH3-THF

2) H2O2, NaOH

Answer 4

Breaks double bond and adds OH to least substituted position

Question 5

H2

Pt

Answer 5

Breaks double bond

Question 6

1) OsO4

2) NaHSO3/H2O

Answer 6

Breaks double bond and adds TWO OHs to the least and most substituted position

Question 7

Cl2

Answer 7

Breaks double bond and adds TWO Cls to the least and most substituted positions

Question 8

Cl2/H2O

Answer 8

Breaks double bond and adds Cl to least substituted position and an OH to most substituted postition

Question 9

1) O3

2) H2O2

Answer 9

Breaks double bond and adds a double bonded O and an OH

Question 10

1) O3

2) DMS

Answer 10

Breaks double bond and adds a double bonded O and an H