The anisotropic effect of 4-substituents on the1H NMR chemical shift of H-5 in phenanthrenes
摘要:
AbstractChloro‐, methoxy‐ and methyl‐substituents in the 4‐position of phenanthrenes exert a profound and diagnostic influence on the 1H chemicalshift of H‐5, and from 13C measurements it is considered to be dueto an anisotropic effect.