Ionization efficiency curves of the gaseous sulfur species Si (i = 2–8) in equilibrium with solid red HgS were obtained by electron impact ionization. Analysis of fine structure of the curves yields energy levels of ground and excited ion states. — For S2 and S8 the experimental values are in good agreement with independent photoionization and photoelectron spectroscopic data from the literature. In the case of S3 to S7 numerous appearance potentials were determined which reflect processes such as direct ionization, autoionization, fragmentation, and predissociation. Extended Hückel calculations were performed for verification of the experimental energies and for spectroscopic assignment of states. — By the second and third law methods the heats of the gas phase reactions Si(g) = i/2 S2(g) (i = 3–8) and average bond energies of the sulfur species were determined.

No abstract

No abstract

Barfuss, S.; Grade, M.; Hirschwalde, W.; Rosinger, W.; Boag, N.M.; Driscoll, D.C.; and Dowben, Peter A., "The stability and decomposition of gaseous chloroferrocenes" (1987). Peter Dowben Publications. 131.

SeS(g) and TeSe(g) molecules, produced by Knudsen‐cell vaporization of the mixed HB/VIA‐systems ZnS/ZnSe and CdSe/CdTe, were studied by energy‐dispersive electron impact ionization. Analysis of ionization efficiency curves yields energy levels of excited ionic states of the molecule ions SeS+(g) and TeSe+ (g). The energy levels correlate with corresponding states of S 2+(g), Se 2+(g) and Te 2+(g) derived from independent photoelectron‐spectroscopic data. ‐ Thermodynamic analysis of the intensity data yields dissociation energies of the neutral and singly ionized species, standard enthalpies of formation, heats and equilibrium constants of the gas‐phase reaction \documentclass{article}\pagestyle{empty}\begin{document}$ {\rm XY}({\rm g}) = \frac{1}{2}{\rm X}_2 ({\rm g}) + \frac{1}{2}{\rm Y}_2 ({\rm g})\,({\rm X} = {\rm Se and Y} = {\rm S},{\rm Te} $\end{document} as well as total and partial pressures for the ZnS/ZnSe‐system.