Alkyne Reactions

Question 1

H2/Pt

Answer 1

Triple bond to single bond

Question 2

Posioned catalyst

Answer 2

(H2/Pd/BaSO4/quinoline)

Makes Z stereo chemistry turns triple bond into double woth two methyl groups

Question 3

Na/NH3 (l)

Answer 3

Makes E stereochemistry. Turns triple bond into double with methyl on opposite sides (E)

Question 4

O3/H2O

Answer 4

Splits molecule and turns triple bond into carboxilic acid

Question 5

HgSO4/H2SO4/H2O

Answer 5

Turns triple bond into carboxilic acid and then into aldehyde

Question 6

BH3/THF/H2O2/OH

Answer 6

Turns triple bond into enol or keto. Keto is more favoured

Question 7

Hx and Br2

Answer 7

Makes triple bond into a double bond with X on one vinilic carbon and H on the other. Or Br on both

Question 8

KMnO4/ H2O

Answer 8

Turns triple bond into 4 OH on the vinilic carbons (2 and 2). And then OH turns into aldehydes =O

Question 9

KMnO4/OH/triangle

Answer 9

Turns triple bond into 2 carboxilic acids

Question 10

How do you form an alkyne from a singke bond?

Answer 10

NaNH2/NH3 (l)