Carbon 1s Photoelectron Spectroscopy of Halomethanes. Effects of Electronegativity, Hardness, Charge Distribution, and Relaxation

Authors

T. Darrah Thomas, Oregon State UniversityFollow
Leif J. Saethre, University of Bergen
Knut J. Børve, University of Bergen
John D. Bozek, University of California
Marko Huttula, University of Oulu
Edwin Kukk, University of Oulu

Date of this Version

2004

Comments

Published in J. Phys. Chem. A. No. 108, pp. 4983-4990, 2004.

Abstract

Carbon 1s ionization energies have been measured for 12 halomethanes. These together with earlier measurements provide 27 compounds for investigating the relationship between core-ionization energies and the electronegativity and hardness of the halogens. The ionization energies correlate nearly linearly with the sum of the electronegativities of the halogens attached to the central carbon. Both electronegativity and hardness play important roles in determining the ionization energy, and it is found that the linear relationship between ionization energy and electronegativity arises from an interplay of the electronegativity and hardness of the halogens and the length and ionicity of the carbon-halogen bond.