
%0 Journal Article
%A Peel, JB 
%A Vonnagyfelsobuki, EI 
%T The Photoelectron Spectra the Chloro Toluenes
%J Australian Journal of Chemistry
%D 1987/04/01
%V 40
%N 4
%P 751-759
%K 
%R https://doi.org/10.1071/CH9870751
%U https://www.publish.csiro.au/paper/CH9870751 
%X The HeI and HeII photoelectron spectra of the chloro  toluenes have been measured. The spectra are assigned using HeI/HeII cross-section ratios and a composite-molecule model within an ab initio  valence-electron-only model potential (VEOMP) framework. The order of the first two ionization potentials for the chloro  toluenes is assigned as &#960;S < &#960;A which is contrary to the VEOMP assignment for benzal chloride and benzotrichloride , but is consistent with linear correlations using group electronegativities and &#963;I scales. Furthermore, linear correlations using the first two ionization potentials of fluoro and chloro  toluenes with group electronegativities are shown to be a useful aid in spectral assignment and, moreover, suggest that for benzyl fluoride and benzal chloride the most appropriate &#963;I values are 0.20 and 0.31 respectively. 
