A two-stage double-hemispherical electron energy selector

Maeda, Kogoro; Semeluk, G. P.; Lossing, F. P.

doi:10.1016/0020-7381(68)85015-6

Cited by 79 publications

(14 citation statements)

References 33 publications

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“…The pyrolysis oven, electron monochromator, and associated appathat of ketene than that of any of the other ratus for measuring IE and AE has been described (3 …”

Section: Resultsmentioning

confidence: 99%

Ionized ethylidene ketene and its homologue methylene ketene

Terlouw¹,

Holmes²,

Lossing³

1983

Can. J. Chem.

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“…The pyrolysis oven, electron monochromator, and associated appathat of ketene than that of any of the other ratus for measuring IE and AE has been described (3 …”

Section: Resultsmentioning

confidence: 99%

Ionized ethylidene ketene and its homologue methylene ketene

Terlouw¹,

Holmes²,

Lossing³

1983

Can. J. Chem.

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“…The appearance energies were measured as described previously (3), using an electrostatic electron monochromator coupled to a quadrupole mass spectrometer (5). The initial portions of the ionization efficiency curves were scanned repeatedly over a range of 0.8eV, and analyzed using a minicomputer data system (6).…”

Section: Methodsmentioning

confidence: 99%

Gas phase heats of formation of alkyl immonium ions

Lossing¹,

Lam²,

Maccoll³

1981

Can. J. Chem.

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Using an energy-resolved electron beam, the gas-phase heats of formation of [CH2NH2]+, [CH3CHNH2]+, [CH3NHCH2]+, [(CH3)2CNH2]+, [(CH3)2NCH2]+, [CH3CHNHCH3]+, [CH3CH2NHCH2]+, and [CH3CH2CHNH2]+ ions have been measured from their appearance energies in ionic dissociations. All of these ions can have a quaternary immonium structure as one of the canonical forms and are consequently more stable than other isomers. Introduction of the —NH2 group into a CH3+ ion brings about a decrease of over 4 eV in the heterolytic bond dissociation energy D(R+—H−), with slightly larger decreases for —NHR and —NR2 groups.

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“…Ionisation and appearance energies were measured using energy selected electrons in an apparatus which has previously been described (16,17). Metastable peaks \\.ere measured on a Kratos-AEI MS902S Mass Spectrometer under conditions of good energy resolution (7).…”

Section: Methodsmentioning

confidence: 99%

The reactivity of [C₃H₃⁺] ions; a thermochemical study

Holmes¹,

Lossing²

1979

Can. J. Chem.

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The loss of halogen atom from the molecular ions of compounds of formulae C3H3Cl and C3H3Br produces the cyclopropenium cation as daughter ion. Each reaction takes place with appreciable reverse activation energy, most of which is partitioned into translational degrees of freedom of the products. In marked contrast, the iodo-analogues generate [propargyl]+ as daughter ions at the thermochemical threshold (i.e. Erev for these fragmentations is ∼0). It is proposed that the reason for this behaviour lies in a large activation energy for the reaction [cyclo-C3H3]+ + I• → [C3H3I]+•

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A two-stage double-hemispherical electron energy selector

Cited by 79 publications

References 33 publications

Ionized ethylidene ketene and its homologue methylene ketene

Ionized ethylidene ketene and its homologue methylene ketene

Gas phase heats of formation of alkyl immonium ions

The reactivity of [C₃H₃⁺] ions; a thermochemical study

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A two-stage double-hemispherical electron energy selector

Cited by 79 publications

References 33 publications

Ionized ethylidene ketene and its homologue methylene ketene

Ionized ethylidene ketene and its homologue methylene ketene

Gas phase heats of formation of alkyl immonium ions

The reactivity of [C3H3+] ions; a thermochemical study

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Product

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The reactivity of [C₃H₃⁺] ions; a thermochemical study