Abstract
Abstract The energy differences Δϵ of the n-orbitals n+ and n− (HOMO and HOMO-1) in the tricyclic and bicyclic diaziridines 1, 2, 5 and 6 have been determined by photoelectron spectroscopy and AM1 calculations. It has been found that Δϵ is determined mainly by the pyramidality of the nitrogen atoms. Although the interactions with the Walsh orbital ωA are considerable, they are of minor importance for the MO separation.
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