Detail of "2994-71-0"

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Measurements of electron attachment lineshapes and cross sections at ultralow electron energies for perfluorocyclohexene, perfluoro-1,2-dimethylcyclobutane, perfluoro-1,3-dimethylcyclohexane, and 1,1,2-trichlorotrifluoroethane

Measurements of electron attachment lineshapes and cross sections at ultralow electron energies for perfluorocyclohexene, perfluoro-1,2-dimethylcyclobutane, perfluoro-1,3-dimethylcyclohexane, and 1,1,2-trichlorotrifluoroethane. Alajajian, S. H.; Chutjian, A. (Jet Propuls. Lab., California Inst. Technol., Pasadena, CA 91109, USA). J. Phys. B: At. Mol. Phys., 19(15), 2393-400 (English) 1986. CODEN: JPAMA4. ISSN: 0022-3700.Several substances with their cas registry numbers 2994-71-0 and 335-27-3 may be metioned in this study. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) Electron attachment cross sections are reported in the electron energy range 0-160 meV and at energy resolns. of 4.5-7.5 meV (full width at half max) for perfluorocyclohexene, perfluoro-1,2-dimethylcyclobutane, perfluoro-1,3-dimethylcyclohexane and 1,1,2-trichlorotrifluoroethane. Use was made of the Kr photoionization technique, and measured attachment lineshapes were converted to cross sections by normalization through attachment rate consts. Comparisons were made with attachment cross sections derived from swarm-measured rate consts. Similar to previous results in eight other mols., the present 4 mols. exhibit resoln.-limited onsets at threshold consistent with an s-wave attachment behavior for which sA(e) ~ e-1/2, and with a neutral-neg.-ion curve crossing at zero energy. .