Dissociative electron attachment for the carbonyl sulphide molecule in the gas phase. Heat of formation of the Cs Radical

Hubin‐Franskin, M.‐J.; Katihabwa, J.; Collin, J.E.

doi:10.1016/0020-7381(76)80155-6

Cited by 4 publications

(6 citation statements)

References 13 publications

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“…This result is consistent with a recent value we found in a negative ion study [1] (≤ 32 kcal mole -1 ) and is considerably lower than that deduced by photo-ionization, photoemission spectroscopy and equilibrium kinetic studies.…”

Section: Heat Of Formation Of the Cs Radicalsupporting

confidence: 81%

“…A recent study of dissociative electron attachment processes in carbonyl sulphide [1] leads us to discuss the value of the heat of formation of the CS radical. A review of the literature data showed that the published values covered a range between ≤ 52.5 kcal mole -1 [2], deduced from the analysis of the chemi-luminescence of CS 2 and COS reactions with metastable rare gas atoms, and 70 kcal mole -1 [3], measured by a mass spectrometric study of the equilibrium CS 2 + S CS + S 2 in the gas phase.…”

Section: Introductionmentioning

confidence: 99%

“…These results have to be considered as a higher limit since the amount of kinetic and internal energy involved in the processes studied is unknown. The dissociative electron attachment process for COS in the gas phase producing O -ions at 3.9 eV, recently studied [1], leads to a heat of formation as low as 32 kcal mole -1 for the CS radical.…”

Section: Introductionmentioning

confidence: 99%

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Dissociative ionization of carbon disulphide in the gas phase. Heat of formation of the CS radical

Hubin‐Franskin

Locht

Katihabwa

1976

Chemical Physics Letters

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Measurements of the appearance potentials and the kinetic energies of S + and CS + ions formed by electron impact on carbon disulphide in the gas phase lead us to propose a value as low as 34 ± 6 kcal mole -1 for the heat of formation of the CS radical in its ground electronic state. It is also shown that the predissociations of the A 2 Π u /or X 2 Π g and the B 2 Σ u molecular ion states by a repulsive 4 Σ -state giving rise to S + ions, observed through metastable ions study, occur at 13.45 eV and 14.55 eV respectively.

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Section: Heat Of Formation Of the Cs Radicalsupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dissociative ionization of carbon disulphide in the gas phase. Heat of formation of the CS radical

Hubin‐Franskin

Locht

Katihabwa

1976

Chemical Physics Letters

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“…OCS + e − → (OCS − ) * −→ S − + CO (1) Excitation function of S − /OCS as displayed in Fig. 1 clearly resolves three different DEA resonances positioned at 5.0, 6.5 and 10.0 eV incident electron energies, agrees well with others reports [32][33][34][35][36][37][38][39]. A weak resonance structure observed near the 8.0 eV incident elec- tron energy is not disclosed in previous reports [32][33][34][35][36][37][38][39].…”

supporting

confidence: 88%

Observation of rovibrationally coupled bi-modality and speed-dependent orientation in DEA dynamics of OCS: reveals partial correlations among point group symmetries

Kundu¹,

Vikrant²,

Jani³

et al. 2022

Preprint

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Dissociative electron attachment (DEA) to gas-phase carbonyl sulfide (OCS) has been studied diligently using the time-of-flight (TOF) based state-of-the-art velocity map imaging (VMI) technique. Three well-resolved DEA resonances are observed at 5.0, 6.5 and 10.0 eV incident electron energies along with a weak structure at 8.0 eV. The velocity slice images (VSI), Kinetic energy (KE) and angular distributions (AD) for the fragmented S − anions are obtained using the wedge slicing technique [1-3]. The KE distributions for the S − nascent fragments reveal bi-modality with rovibrational signatures. The ADs substantiate speed-dependent angular anisotropy demand the existence of partial correlations among three different point group symmetries (CS, C2V & C∞V ), confirmed through an in-plane bending mode of vibration with the axial recoil breakdown. Theoretical calculations using R-matrix and density functional approaches strongly support the experimental observations.

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“…Iga et al, 53 as well as other groups, 67 have scattered electrons, ranging in energy from 0 to 20 eV above the vacuum level, on isolated OCS(X 1 ⌺). They observe many negative ion resonances which produce various anionic fragments; however, they do not observe SO Ϫ products at any of the electron energies studied.…”

Section: Dissociation Dynamics In Somentioning

confidence: 98%

Dynamics of dissociative scattering: Hyperthermal energy collisions of state-selected OCS+ on Ag(111)

Morris

Kim

Barstis

et al. 1997

The Journal of Chemical Physics

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Articles you may be interested inDynamics of the dissociative and nondissociative scattering of hyperthermal CS 2 + from a self-assembled fluoroalkyl monolayer surface on gold substrate Surface induced dissociations of protonated ethanol monomer, dimer and trimer ions: Trimer break-down graph from the collision energy dependence of projectile fragmentation Fragmentation and ion-scattering in the low-energy collisions of small silver cluster ions ( Ag n + :n=1−4) with a highly oriented pyrolytic graphite surfaceThe dynamics of dissociation and negative ion formation have been investigated for the hyperthermal energy scattering of state-selected OCS ϩ (X 2 ⌸ x , 1 , 2 , 3 ) on Ag͑111͒. Experiments reveal the effect that collision energy and internal energy have on the formation of scattered ionic products. An analysis of the appearance threshold and fragment velocity distribution for each scattered product channel ͓S Ϫ ( 2 P), O Ϫ ( 2 P), and SO Ϫ (X 2 ⌸)] suggests that three distinct fragmentation mechanisms compete. Prompt impulsive dissociation of neutralized OCS ϩ (X 2 ⌸), followed by electron attachment to the nascent O fragment, is responsible for O Ϫ ( 2 P) emergence. The production of SO Ϫ (X 2 ⌸) relies on a collisionally activated distortion of OCS, forcing the O and S atoms close together while ejecting the central carbon atom. Finally, a comparison between the scattering of state-selected OCS ϩ (X 2 ⌸ x , 1 , 2 , 3 ) and S ϩ ( 4 S) on Ag͑111͒ provides strong evidence that dissociative neutralization of OCS ϩ (X 2 ⌸ x , 1 , 2 , 3 ) leads to S Ϫ ( 2 P) fragments. A discussion of time scales for the various dissociation mechanisms is presented.

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Dissociative electron attachment for the carbonyl sulphide molecule in the gas phase. Heat of formation of the Cs Radical

Cited by 4 publications

References 13 publications

Dissociative ionization of carbon disulphide in the gas phase. Heat of formation of the CS radical

Dissociative ionization of carbon disulphide in the gas phase. Heat of formation of the CS radical

Observation of rovibrationally coupled bi-modality and speed-dependent orientation in DEA dynamics of OCS: reveals partial correlations among point group symmetries

Dynamics of dissociative scattering: Hyperthermal energy collisions of state-selected OCS+ on Ag(111)

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