Triatomic Molecules and Sulfur Fluorides

In Chapter 8 the electron affinities of atoms were evaluated. In this chapter the electron affinities of diatomic and triatomic molecules and SF (n= 1 to 6) will be considered. The ECD has been used to study CI2, Br2, I2, NO, 02, C02, COS, CS2, N20, N02, SO2, SF6. All the Ea for these molecules have been calculated by the CURES-EC method. The comparison of the relative electron affinities of COS, CS2, and N20 will be illustrated by READS-TCT calculations. 

The homonuclear diatomic molecules are the simplest closed set of molecules. Many of the electron affinities of the main group diatomic molecules have been measured by anion photoelectron spectroscopy (PES), but only a few have been confirmed. These Ea can be examined by their systematic variation in the Periodic Table. Calculating Morse potential energy curves for the anions and comparing them with curves for isoelectronic species confirm experimental values. The homo-nuclear diatomic anions of Group IA, IB, VI, VII, and 3d elements and NO are examined first. 

Anions of SF (n = 1 to 6) provide a transition to larger molecules. The anions of SF6 and SF4 are among the most frequently studied in the gas phase. The ECD, atmospheric pressure ionization, and low-pressure chemical ionization mass spectrometry have been used to study SF6. The precise and accurate adiabatic electron 

The Electron Capture Detector and the Study of Reactions with Thermal Electrons 

---