Orgnic Chemistry Exam IV

Question 1

H₂, (Pt, Pd, Ni)

Answer 1

(Good Catalyst)

Question 2

H₂, POISON (Pt, Pd, Ni)

Answer 2

Lindlar’s Catalyst

Question 3

Na, NH₃

Answer 3

Addition of H₂ to Alkyne

Question 4

1 Mol of Br2, CCl4

To Alkyne

Answer 4

MAJOR: TRANS-2,3-dibromo-2-butene

AND

********MINOR: Cis-2,3-dibromo-2-butene********

Question 5

2 Mol Br₂ (Excess Br₂)

(OR Alkyne to 1 Mol of Br₂)

Answer 5

Saturated Compound

CH₃-CBr₂-CBr₂-CH₃

Question 6

1 Mol HBr

Markovnikov Addition

Answer 6

⇒ 2-Bromo-propene + 1 Mol HCl (Markonikov) ⇒

2-Bromo-propane

Question 7

Excess HBr

Answer 7

CH₃-CBr₂-CH₃

Question 8

Excess HBr with H₂O₂

Answer 8

CH₃-CH₃-CBr₂H

ANTIMARKOVNIKOV

ROOR = Peroxide

Question 9

Excess HCl

Answer 9

CH₃-CCl₂-CH₃

Excess in HCl Has no affect on Alkyne Chemistry

HCl affects Alkene Chemistry

Question 10

HgSO₄, H₂SO₄, H₂O

Answer 10

First You Get the Enol.

Enol is Unstable. Now you Get the Keto Tautomer (CARBONYL Group)

Question 11

1) Sia₂BH, 2) H₂O₂, OH^-

Answer 11

CH₃-CH₂-HC=O

Enol Tautomer (Briefly) Keto Tautomer in ANTI-Markovnikov

Question 12

1) B₂H₆, 2) H₂O₂

Question 13

1) (Sia)₂BH, 2)H₂O₂, ^-OH

Answer 13

OH-HC=CH-CH₃

Tautomerizes

HC=O-CH₂CH₃

You get the Enol then it Tautomerizes into the Keto Form