Mass spectrometric study of the photoionization of carbon disulphide in the wavelength interval 125–60 nm

The ionization and dissociative ionization of CS2 by photon impact have been investigated mass spectrometrically in the wavelength interval λ= 125–60 nm. The efficiency curves for formation of CS+2, CS+, S+ and S+2 are presented and discussed.From the thresholds for formation of the fragment ions, values for the bond dissociation energy D°(S—CS, g, 0 K)= 432.1 ± 2.0 kJ mol–1, the dissociation energy of CS, D°(CS, g, 0 K)= 712.1 ± 2.3 kJ mol–1, the enthalpy of formation of CS, ΔHof(CS, g, 0 K)= 273.9 ± 2.2 kJ mol–1 and the ionization potential of S2, i.p.(S2)= 9.38 ± 0.03 eV are deduced and compared with literature values.