Boykin, David W. published the artcileOxygen-17 nuclear magnetic resonance spectroscopic study of substituted phthalic anhydrides and phthalides, Category: benzofurans, the main research area is NMR oxygen phthalic anhydride phthalide.
17O chem. shift data (natural abundance) for 3-substituted phthalic anhydrides and 4- and 7-substituted phthalides in acetonitrile at 75° are reported. Steric interactions of substituents ortho to the carbonyl groups result in deshielding effects (9-22 ppm) relative to parent compounds regardless of the electronic character of the substituents. Factors contributing to the deshielding effects are discussed. The relationship between 17O chem. shifts and regiochem. of the phthalic anhydrides is discussed.
Canadian Journal of Chemistry published new progress about NMR (nuclear magnetic resonance). 52010-22-7 belongs to class benzofurans, name is 4-Chlorophthalide, and the molecular formula is C8H5ClO2, Category: benzofurans.
Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem