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PHOTOELECTRON AND ULTRAVIOLET ABSORPTION SPECTRA OF THE ENAMINES OF A SERIES OF SIMPLE POLYENES

Abstract— The photoelectron and ultraviolet absorption spectra of a series of enamines containing one, two or three double bonds have been determined. In all cases. the ionízation potential and lowest frequency absorption bands are at considerably lower energies than for the corresponding imines (Schiff bases). It is suggested that these facts should be taken into account when the structures of the various intermediates in the cycles of rhodopsin and bacteriorhodopsin are assessed.