Collect. Czech. Chem. Commun. 1981, 46, 20-30

Interpretation of electronic spectra of linear polynuclear p-quinones by the method of configuration analysis

Miloš Nepraša, Jürgen Fabianb and Miloš Titza

a Research Institute of Organic Syntheses, 532 18 Pardubice-Rybitví, Czechoslovakia
b Department of Chemistry, Technical University of Dresden, Dresden, GDR


Character of transition in a series of linear p-quinones has been investigated on the basis of configuration analysis. Correlation graphs of the states have been constructed enabling interpretation of the spectra in the terms of local transitions in the fragments and charge-transfer transitions between the fragments. Influence of various types of annelation on the first ππ* absorption band in the spectra of the mentioned compound class has been investigated qualitatively from the viewpoint of interaction of the frontier MOs of the fragments.