Spectres de vibration du diméthylsulfoxyde et dn diméthylsulfoxyde-d6

A valence force field for aliphatic sulfur compounds: Alkanethiols and thioalkanes

The vapor phase absorption spectra of dimethylsulfide, dimethylselenide, and dimethyltelluride are reported for the 40 000–80 000 cm−1 vacuum ultraviolet spectral region. Three Rydberg series for each compound were assigned which converge on the ionization potentials of 8.706 ± 0.010, 8.400 ± 0.010, and 7.926 ± 0.010 eV for dimethylsulfide, dimethylselenide, and dimethyltelluride, respectively. These ionization potentials and corresponding Rydberg series members are assigned as originating from the central atom valence p orbital, which is perpendicular to the plane of the molecule. A correlation of the ionization potentials calculated for these molecules to ionization potentials of corresponding rare gases is presented. The term values of Rydberg members of the dimethyl chalcogens are also correlated to the term values of allowed atomic Rydberg series in the rare gases, thus atomic nomenclature is used in the assignment of the molecular Rydberg series. Higher energy absorptions in the spectra of dimethyls...

Vacuum ultraviolet absorption spectra of dimethylsulfide, dimethylselenide, and dimethyltelluride

Fast, sensitive, and selective fingerprint detection of organometallics, with emphasis on dimethyltelluride CH3TeCH3, is described, using short and ultrashort pulse tunable dye laser controlled time‐of‐flight mass spectroscopy. Excellent spatial (∼10 μm) and time (≪1 ns) resolutions combined with high single shot selectivity and sensitivity down to 10−7 Torr and below (corresponding to 3×109 cm−3 or about 3000 molecules in the observation region) plus mass identification are obtained.

J.R. Allkins

Papers

The infra-red and Raman spectra of dimethyl sulphide, selenide and telluride