H-NMR

Question 1

H on a Phenol

Answer 1

About 4-7 ppm

Question 2

Benzyl Proton

Answer 2

About 6.5-8

Question 3

Ketone hydrogen

Answer 3

9-10 ppm

Question 4

Carboxylic Acid Hydrogen

Answer 4

10-12 ppm

Question 5

Amide Hydrogens

Answer 5

5-8 ppm

Question 6

Methyl Proton

Answer 6

0.85 ppm

Question 7

Methylene Proton

Answer 7

1.20 ppm

Question 8

Methine Proton

Answer 8

1.55 ppm

Question 9

Enantiotopic Hydrogens

Answer 9

When a carbon is bonded to two H’s and two nonequivalent groups, the H’s are enantiotopic.
They are chemically equivalent so they show up as ONE signal on the NMR.

Question 10

Diastereotopic Hydrogens

Answer 10

When a carbon bound to an asymmetric center is also bound to two H’s, the H’s are diastereotopic.
The H’s are NOT chemically equivalent so they will show up as TWO signals in the NMR

Question 11

J (coupling constant)

Answer 11

The distance between adjacent peaks. The magnitude is an indication as to how strongly the nuclear spin of the protons effect each other.
Measured in Hz