The ultraviolet and infrared spectra of some lichen depsides and depsidones

Abstract

The ultraviolet and infrared spectral data for a number of lichen depsides, depsidones and their fission products have been recorded. The U.V. spectra of the orcinol depsides, orcinol depsidones and β-orcinol depsidones are characteristic while those of the β-orcinol depsides less useful for diagnostic purposes. The I.R. spectra are more useful and the carbonyl region is significant for this purpose.