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Document type:
Zeitschriftenaufsatz 
Author(s):
Entfellner, Michaela; Boesl, Ulrich 
Title:
Photodetachment-photoelectron spectroscopy of disulfanide: the ground and first excited electronic state of HS2 and DS2 
Abstract:
Photodetachment-photoelectron spectra of HS2- and DS2- are presented. The obtained electron affinities (EA (HS2) = 1.916 ± 0.015 eV and EA (DS2) = 1.918 ± 0.015 eV) are in good agreement with earlier results. Photodetachment into the neutral ground state of the radicals HS2 and DS2 leads to excitation of the S-S stretching mode, whereas photodetachment into the first excited state causes a S-S-H bending and a weak S-H stretching motion. Addnl., weak peaks of S2 were obsd. in the spectra of HS2 and DS2, leading to the conclusion that photodetachment with 2.77 eV (448 nm) causes dissocn. of HS2- and DS2- into S2- and H/D. Taking 2.77 eV as an upper limit for D0(S2--H) a lower limit for ΔfH0(HS2(g)) of 100.8 kJ mol-1 is obtained which is an improvement on the literature value of 107.145 ± 10.46 kJ mol-1. [on SciFinder(R)] 
Keywords:
Molecular structure (optimized photodetachment-photoelectron spectroscopy of disulfanide) Electron affinity Electron photodetachment Excited electronic state Ground state Molecular vibration Photoelectron spectra Vibrational frequency (photodetachment-photoelectron spectroscopy of disulfanide) Radicals Role: PRP (Properties) (photodetachment-photoelectron spectroscopy of disulfanide) photodetachment photoelectron spectroscopy disulfanide 
Congress title:
CAN 150:514691 22-9 Physical Organic Chemistry Department of Chemistry, Technical University of Munich, Garching, Germany. Journal 1463-9076 26693-74-3 (Sulfide (HS21-)); 113109-54-9 (Sulfide (DS21-)) Role: PEP (Physical, engineering or chemical process), PRP (Properties), RCT (Reactant), PROC (Process), RACT (Reactant or reagent) (photodetachment-photoelectron spectroscopy of disulfanide); 14541-24-3 (Thiosulfeno); 95262-75-2 (Thiosulfeno-d) Role: PRP (Properties) (photodetachment-photoelect...    »
 
Journal title:
Phys. Chem. Chem. Phys. 
Year:
2009 
Journal volume:
11 
Journal issue:
15 
Pages contribution:
2657-2662 
Fulltext / DOI: