Dissociative electron attachment to S[sub 2]F[sub 10], S[sub 2]OF[sub 10], and S[sub 2]O[sub 2]F[sub 10]

Journal Article · Tue Jun 15 04:00:00 EDT 1993 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.464378· OSTI ID:6496656

Olthoff, J K; Stricklett, K L; Van Brunt, R J ^[1]; Moore, J H; Tossell, J A ^[2]; Sauers, I ^[3]

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1. National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)
2. Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742 (United States)
3. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

The absolute cross sections for dissociative electron attachment to the molecules S[sub 2]F[sub 10], S[sub 2]OF[sub 10], and S[sub 2]O[sub 2]F[sub 10] were measured in an electron transmission experiment. The corresponding negative-ion fragments were identified in a separate mass spectrometric measurement. For S[sub 2]F[sub 10], the attachment of thermal electrons (energy less than 0.1 eV) appears to result primarily in the formation of F[sup [minus]] and SF[sub 5][sup [minus]] with possibly a small fraction of SF[sub 4][sup [minus]] and SF[sub 6][sup [minus]]. The ions F[sup [minus]] and SF[sub 5][sup [minus]] are also produced from two attachment resonances at electron energies of about 4.5 and 9.5 eV. Both S[sub 2]OF[sub 10] and S[sub 2]O[sub 2]F[sub 10] have unusually large dissociative attachment cross sections (on the order of 10[sup [minus]12] cm[sup 2]) at energies near 0.1 eV. Electron attachment to S[sub 2]OF[sub 10] yields primarily SOF[sub 5][sup [minus]], while S[sub 2]O[sub 2]F[sub 10] yields both SF[sub 5][sup [minus]] and SOF[sub 5][sup [minus]] with possible minor fractions of F[sup [minus]] and SOF[sub 3][sup [minus]]. Self-consistent-field calculations have been carried out on the neutral molecules and the corresponding anions to aid in the description of the observed dissociative attachment.

• OSTI ID: 6496656
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 98:12; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

664100 -- Theory of Electronic Structure of Atoms & Molecules-- (1992-)
664400* -- Experimentally Derived Information on Atomic & Molecular Properties-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ANIONS
ATOMIC CLUSTERS
CHALCOGENIDES
CHARGED PARTICLES
CROSS SECTIONS
DISSOCIATION
ELECTRON ATTACHMENT
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IONS
OXIDES
OXYGEN COMPOUNDS
SULFUR COMPOUNDS
SULFUR FLUORIDES
SULFUR OXIDES
YIELDS