Solution Structures of Pyrophthalones,III: Complementary Application of 14N/16N-NMR Spectroscopy to Study Solution Structures of Pyrophthalones

The solution structures of nine pyrophthalone-type substances are determined by ¹⁴N / ¹⁵N-NMR-spectroscopy. Mostly depending on the conditions (solvent, solubility, chemical nature of the compound), both isotopes can be used complementary to obtain reliable data. Additionally, for some compounds ¹⁵N solid state NMR data are available and demonstrate the structural identity in solution and the solid state.