The goal of this puzzle is to distinguish between strong coupling and peak overlap.
For the following 1H NMR spectrum, are the 1H signals at 7.58-7.59 ppm exhibiting strong coupling or are they two overlapping multiplets or both?
The goal of this puzzle is to distinguish between strong coupling and peak overlap.
For the following 1H NMR spectrum, are the 1H signals at 7.58-7.59 ppm exhibiting strong coupling or are they two overlapping multiplets or both?
It does not look like exclusively strong coupling to me. For that magnitude of roofing I would expect the partner at about 7.7 ppm or closer.
ReplyDeleteOther than classic experiments, a pure shift spectrum would help interpreting overlap situations.