Metastable Transitions in the Mass Spectrum of Iron Pentacarbonyl

Winters, Robert E.; Collins, Jerome H.

doi:10.1021/j100878a508

Cited by 21 publications

(13 citation statements)

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“…In these types of studies, it is important to ensure that the reactant M+ is cleanly isolated to unequivocally assign the observed chemistry. For example, 70-eV electron impact of FefCO), can produce doubly charged ions [16]. One such possibility that was a concern in these experiments is the Fe(CO)g+ doubly charged ion with the same nominal mass-to-charge ratio value as Fe+.…”

Section: Methodsmentioning

confidence: 99%

Collisional relaxation of metastable electronic states of Fe⁺

Russell

Solouki

Oriedo

1995

J. Am. Soc. Mass Spectrom.

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The overall rate constants for collisional relaxation of metastable excited states of Fe(+) by He, Ar, Kr, H2, (2)H2, CO, N2, NO, CH4, and CH3OH have been studied by using charge-exchange ion-molecule reaction chemistry. The rate constants vary according to the nature of the quenching reagent as well as the energy level and electron configuration of the Fe(+) ions. In general, NO, CH4, and CH3OH are the most efficient quenching reagents with rate constants that approach the Langevin collision rate, whereas the reaction rates for the rare gas atoms are slow and vary depending upon the specific electron configuration of the Fe(+) ion. The mechanism of collisional relaxation is discussed with emphasis on a curve-crossing. mechanism for the rare gas atoms. An electron-transfer mechanism is described for the relaxation of high lying (Fe(+))*.

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Section: Methodsmentioning

confidence: 99%

Collisional relaxation of metastable electronic states of Fe⁺

Russell

Solouki

Oriedo

1995

J. Am. Soc. Mass Spectrom.

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“…The parent doubly charged ion Fe(CO) 5 ++ is not detectable here (at m / z 98), but its existence as a stable entity is attested in electron impact mass spectrometry. 19 Of the doubly charged species observed here [Fe(CO) 3 ++ , Fe(CO) 2 ++ , and FeCO ++ ], only FeCO ++ was observed in the ion impact experiments of Indrajith et al 20 …”

Section: Introductionmentioning

confidence: 71%

Unimolecular Double Photoionization-Induced Processes in Iron Pentacarbonyl

et al. 2021

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The dissociations of nascent Fe(CO) 5 ++ ions created by 40.81 eV photoionization of iron pentacarbonyl have been examined using threefold and fourfold electron–ion coincidence measurements. The energies and forms of the ions have been explored by high-level calculations, revealing several new structures. The most stable form of Fe(CO) 5 ++ has a quite different geometry from that of the neutral molecule. The dissociation pattern can be modeled as a sequence of CO evaporations followed by two-body charge separations. Each Fe(CO) n ++ ( n = 1–4) dication is stable in a restricted energy range; as its internal energy increases, it first ejects a neutral CO, then loses CO + by charge separation at higher energy. In the initial stages, charge-retaining CO evaporations dominate over charge separation, but the latter become more competitive as the number of residual CO ligands decreases. At energies where ionization is mainly from the CO ligands, new Fe–C and C–C bonds are created by a mechanism which might be relevant to catalysis by Fe.

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“…Ferrocen und Dibenzolchrom unterliegen in erster Linie der Metall-Ligand- lither Strukturenr23-5 7 . 7 7 9 1 0 1 -1071 ; d ie Gleichungen (30) Der ProzeD (27) in denen die Abstande der einzelnen Multiplett-Schwerpunkte grokr als die der Multiplett-Komponenten sind. Sieht man von der Moglichkeit der Spin-Entkoppelung[" oder der gezielten Einfuhrung geeigneter Isotope in das zu untersuchende Molekiil ab, so bietet sich zur Herabsetzung der Spektrenordnung vor allem die Variation des auf die einzelnen Kernmagnete einwirkenden Magnetfeldes an.…”

Section: Ringspaltungsprozesseunclassified

“…In den Spektren von Halogenbenzol-tricarbonylchrom-Verbindungen treten Chromhalogen-Ionen auf [GI. (27)], deren Intensitaten entsprechend dem Gang der Elektronegativitaten vom Jodid zum Fluorid stark zunehmentS0]. Besonders begunstigt sind Wanderungen elektronegativer Gruppen dann, wenn gleichzeitig sehr stabile Ionen wie das Tropylium-Ion entstehen konnen [GI.…”

Section: Abspaltung Von Halogenatomen Sowie Von R- Ok-und Nr-radikalenunclassified

Zerfall von Organometallkomplexen im Massenspektrometer

Müller¹

1972

Angewandte Chemie

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Metastable Transitions in the Mass Spectrum of Iron Pentacarbonyl

Cited by 21 publications

References 1 publication

Collisional relaxation of metastable electronic states of Fe⁺

Collisional relaxation of metastable electronic states of Fe⁺

Unimolecular Double Photoionization-Induced Processes in Iron Pentacarbonyl

Zerfall von Organometallkomplexen im Massenspektrometer

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Metastable Transitions in the Mass Spectrum of Iron Pentacarbonyl

Cited by 21 publications

References 1 publication

Collisional relaxation of metastable electronic states of Fe+

Collisional relaxation of metastable electronic states of Fe+

Unimolecular Double Photoionization-Induced Processes in Iron Pentacarbonyl

Zerfall von Organometallkomplexen im Massenspektrometer

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Collisional relaxation of metastable electronic states of Fe⁺

Collisional relaxation of metastable electronic states of Fe⁺