SPECTROSCOPIC STUDIES OF THE AUTOCOMPLEX TYPE COMPOUNDS .1. USE OF SPECTROPHOTOMETRY DERIVATIVES FOR INTERPRETATION OF ELECTRONIC-SPECTRA OF AUTOCOMPLEXES OF THE PICRAMIDE SERIES

The complicated electronic absorption spectra of several picramide aut ocomplexes were interpreted by the second derivative spectrophotometri c method. A linear correlation was established between the values of t he intramolecular charge-transfer energy and the ionization potential of a donor fragment of molecules. The ionization potentials of several compounds were determined.