PHOTOELECTRON-SPECTRA OF 1,4-BENZODIAZEPINES

Photoelectron (PE) spectra of 20 biologically active molecules of 1,4- benzodiazepine derivatives have been measured. The spectra in the rang e of low ionization energies (IE) were interpreted by comparison of MN DO quantum-chemical calculation data with the perturbation theory esti mations. The effect of substituents and structural changes in the seri es studied is felt mainly by the pi-MOs of ring A; the ortho effect is observed in the PE spectra of ortho isomers.