pKa's of acetylenic hydrogens

Question 1

H-OH

Answer 1

15.7

Question 2

H-OR

Answer 2

16-17

Question 3

H-C- - -CR (triple bond between C and CR)

Answer 3

25

Question 4

H-NH2

Answer 4

38

Question 5

H-CH- -CH2 (double bond between CH and CH2)

Answer 5

44

Question 6

H-CH3CH3

Answer 6

50