Electron ionization of W(CO)6: Appearance energies

Wnorowski, K.; Staňo, Michal; Barszczewska, W.; Jówko, A.; Matejčík, Štefan

doi:10.1016/j.ijms.2012.02.002

“…Several gas-phase studies on electron interactions with isolated EBID precursor molecules W(CO) 6 , Co(CO) 3 (NO), MeCpPtMe 3 and Pt(PF 3 ) 4 have been reported in the literature, [13][14][15][16][17] where dissociative electron attachment (DEA) has been suggested to be an important decomposition process lending support to bond breaking of the same molecules adsorbed on solid surfaces when exposed to 500 eV electrons. 18 Of relevance, DEA leads to the incomplete loss of CO ligands, conferring therefore a particular contaminating behaviour on the edge of the deposit.…”

mentioning

confidence: 99%

“…Monomer ionization mainly involves the loss of n (CO) ligands (n = 1-6), 15 which is also a characteristic fragmentation after the ionization of the dimer. For example, the amount of the dimer ions is about 27% of the most abundant cluster fragment W 2 (CO) 9 + (not shown).…”

mentioning

confidence: 99%

Complete ligand loss in electron ionization of the weakly bound organometallic tungsten hexacarbonyl dimer

Neustetter

¹

,

Mauracher

²

,

Limão-Vieira

³

et al. 2016

Phys. Chem. Chem. Phys.

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“…As an experimental technique, mass spectrometry of negative ions in electron resonance capture mode ranks next to the fractional quantum Hall effect in which fractional values of the charge quantization are observed. Also noted the resonance possibility capture of electron with "negative" kinetic energy.The recent reports of Wnorowski et al [1,2] on investigations of the decay of tungsten hexacarbonyl, W(CO) 6 , using electron ionization (EI)[1] and dissociative electron attachment (DEA)[2] methods were of particular interest to the low-temperature plasma and nanotechnology communities. Furthermore, the dissociative photoionisation of W(CO) 6 was, however, discussed in an earlier paper.…”

mentioning

confidence: 99%

Chemical Bonds Dissociation Energy

Iakubov¹

2017

Preprint

0

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In previous publications dealing with experimental mass spectrometry of tungsten hexacarbonyl, hexafluoroacetylacetone and its bidentate metal complexes M(hfac) 2 ; M = Cu, Pd the obtained data have been not adequately systematized. In this paper, we analyse the previously published experimental data of the various bond dissociation energy. A modified Yukawa potential, which is the exact solution of the problem dependence the chemical bond energy of its length, is used to analyse the experimental data. Experimental results of the formation of ions can be interpreted only in terms of the formation of fractionally charged quasiparticles. As an experimental technique, mass spectrometry of negative ions in electron resonance capture mode ranks next to the fractional quantum Hall effect in which fractional values of the charge quantization are observed. Also noted the resonance possibility capture of electron with "negative" kinetic energy.The recent reports of Wnorowski et al. [1,2] on investigations of the decay of tungsten hexacarbonyl, W(CO) 6 , using electron ionization (EI)[1] and dissociative electron attachment (DEA)[2] methods were of particular interest to the low-temperature plasma and nanotechnology communities. Furthermore, the dissociative photoionisation of W(CO) 6 was, however, discussed in an earlier paper.[3] It was shown that the bond dissociation of [W(CO) n + ]-CO (n = 0-5) most likely proceeds differently if n < 3 or if n ≥ 3 and that the dissociation occurs from both vibrational excited states or from the electronic-vibrational excited states. The interaction of lowenergy electrons with W(CO) 6 was, however, discussed in a much earlier paper.[4] Our interest here is with the predominantly sequential detachment of a CO ligand from W(CO) 6 , as well as presenting a comparison of the chemical bond dissociation energy BDE(W−CO) as calculated with the EI and DEA processes.In Ref.

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“…1, the EI (Eqns. (1) and (3)) and dissociative ionizations (Eqns. (2) and (4)) of W(CO) 6 in the gas phase were given as e − + M → M + + 2e − , …”

mentioning

confidence: 99%

“…This, in turn, imposes the condition that the interatomic spacing be a half-wavelength of the Lewis electron pair ( D ) and hence implies chemical bond energy quantization 1 . The chemical bond energy U is expressed as 1 Note that in classical chemistry there is always a clear understanding of the fact that a symmetry breakdown is accompanied by the appearance of a compensating electromagnetic field, i.e. the transition from a symmetric to asymmetric biatomic molecule is accompanied by the appearance of a dipole moment in the latter.…”

mentioning

confidence: 99%

Chemical Bonds Dissociation Energy

Iakubov¹

2017

Preprint

0

View full text Add to dashboard Cite

In previous publications dealing with experimental mass spectrometry of tungsten hexacarbonyl, hexafluoroacetylacetone and its bidentate metal complexes M(hfac) 2 ; M = Cu, Pd the obtained data have been not adequately systematized. In this paper, we analyse the previously published experimental data of the various bond dissociation energy. A modified Yukawa potential, which is the exact solution of the problem dependence the chemical bond energy of its length, is used to analyse the experimental data. Experimental results of the formation of ions can be interpreted only in terms of the formation of fractionally charged quasiparticles. As an experimental technique, mass spectrometry of negative ions in electron resonance capture mode ranks next to the fractional quantum Hall effect in which fractional values of the charge quantization are observed. Also noted the resonance possibility capture of electron with "negative" kinetic energy.The recent reports of Wnorowski et al. [1,2] on investigations of the decay of tungsten hexacarbonyl, W(CO) 6 , using electron ionization (EI)[1] and dissociative electron attachment (DEA)[2] methods were of particular interest to the low-temperature plasma and nanotechnology communities. Furthermore, the dissociative photoionisation of W(CO) 6 was, however, discussed in an earlier paper.[3] It was shown that the bond dissociation of [W(CO) n + ]-CO (n = 0-5) most likely proceeds differently if n < 3 or if n ≥ 3 and that the dissociation occurs from both vibrational excited states or from the electronic-vibrational excited states. The interaction of lowenergy electrons with W(CO) 6 was, however, discussed in a much earlier paper.[4] Our interest here is with the predominantly sequential detachment of a CO ligand from W(CO) 6 , as well as presenting a comparison of the chemical bond dissociation energy BDE(W−CO) as calculated with the EI and DEA processes.In Ref.

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Electron ionization of W(CO)6: Appearance energies

Cited by 43 publications

References 26 publications

Complete ligand loss in electron ionization of the weakly bound organometallic tungsten hexacarbonyl dimer

Complete ligand loss in electron ionization of the weakly bound organometallic tungsten hexacarbonyl dimer

Chemical Bonds Dissociation Energy

Chemical Bonds Dissociation Energy

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