Proton NMR

Question 1

Methyl vs Alkyl protons

Answer 1

Shift of methyl proton 0.5ppm less than alkyl chain

Question 2

Protons on three membered rings

Answer 2

Proton shift unusually low, complicated splitting

Question 3

Protons on a double-bonded carbon

Answer 3

Shift around 5ppm

Question 4

Protons on O- vs N- connected carbon

Answer 4

Shift 1ppm greater for O than N

Shift increased by conjugation into a ketone

Question 5

Aldehydes vs Ester protons

Answer 5

Shift of aldehyde proton greater than formate ester

Question 6

Aromatic vs Alkene protons

Answer 6

Aromatic protons have greater shift