July 7, 2011
by Arvin Moser, Team Manager, Application Scientists, ACD/Labs
The purpose of this post is to demonstrate how a small difference can result in a big misinterpretation.
For an unknown compound, the 1H NMR spectra below shows the same coupling pattern with different interpretations for the coupling constants. Which of the two spectra A or B shows the better interpretation? Why?
![](https://www.acdlabs.com/wp-content/uploads/2022/06/img_62a9e064841db.png)