Question
Pharmaceutical Analysis Question on Proton nuclear magnetic resonance spectrometry
Which among the following rules about spin-spin coupling and bond multiplicities are correct with regard to NMR spectra
A
Coupling constant rarely exceeds 20 cps whilechemical shifts are over 1000 cps
B
Spin - Spin interactions are dependent of strength of the applied field
C
Coupling constants increase with distance
D
Equivalent nuclei interact with each other to show interaction
Answer
Coupling constant rarely exceeds 20 cps whilechemical shifts are over 1000 cps
Explanation
Solution
The correct option is (A) : Coupling constant rarely exceeds 20 cps whilechemical shifts are over 1000 cps