15N nuclear magnetic resonance chemical shifts and one-bond 15N-31P couplings are reported for a series of five N-arylphosphoramidates and four N-arylphosphorimidates. Results are interpreted in terms of an extensively delocalized N lone pair in the phosphoramidates, with p π-p π donation into the aromatic ring being dominant over p π-d π donation from nitrogen to phosphorus.
![5-bromo-N-[4-[(4,6-dimethylpyrimidin-2-yl)sulfamoyl]phenyl]-2-hydroxybenzamide Structure](https://image.chemsrc.com/caspic/296/7006-95-3.png)
