The Photoelectron Spectra of the N-Chloro and N-Bromo Derivatives of Dimethylamine

Abstract

The He I and He II spectra obtained for chlorodimethylamine (CH₃)₂NCl, and bromodimethylamine (CH₃)₂NBr, complete the study of the N-chloro and N-bromo derivatives of the small amines. The valence photoelectron spectra are interpreted with the aid of SPINDO molecular orbital calculations. Trends in the observed ionization energies for both series of small halo amines are described in terms of variations in inductive and resonance effects, the latter particularly concerning the n_N/n_x lone-pair interactions observed in the low ionization energy range.