Topic
Methanium
About: Methanium is a research topic. Over the lifetime, 16 publications have been published within this topic receiving 315 citations. The topic is also known as: CH5+.
Papers
TL;DR: In this paper, an ion cyclotron resonance (ICR) absorption spectrum has been obtained by exciting an ICR spectral segment with a fixed-frequency electric field pulse, followed by broad-band detection, digitization of the (time-domain) transient response, and digital Fourier transformation to produce the (frequency-domain), absorption spectrum.
Abstract: An ion cyclotron resonance (ICR) absorption spectrum has been obtained by exciting an ICR spectral segment with a fixed-frequency electric field pulse, followed by broad-band detection, digitization of the (time-domain) transient response, and digital Fourier transformation to produce the (frequency-domain) absorption spectrum. For a given signal-to-noise ratio and resolution, the FT-ICR method generates a spectrum in a time which is two orders of magnitude shorter than that required in conventional slow-sweep ICR detection. In the present example, a signal-to-noise ratio of 8 :1 and a mass resolution of about 0.005 amu for CH 4 + (from CH 4 at a pressure of 8 X 10 -7 torr) have been achieved, using a single data acquisition period of 25.6 msec.
105 citations
TL;DR: In this paper, the reaction of methanium ions formed in the low energy electron impact ionization of CH4-CD4 mixtures is shown to be compatible with a methenium ion of Cs symmetry in which intramolecular rearrangement does not occur.
Abstract: Studies of proton and deuteron transfer from methanium ions to various substrates and collision‐induced dissociation of isotopically substituted methanium ions suggest that under the low‐energy conditions of the ICR experiment, the addition of a hydrogen ion to methane produces a methanium ion whose hydrogens are structurally and chemically distinguishable. The reactions of methanium ions formed in the low energy electron impact ionization of CH4–CD4 mixtures are compatible with a methanium ion of Cs symmetry in which intramolecular rearrangement does not occur. Reaction studies on the methanium ions formed by the exoergic proton transfer from D3+ to methane indicate that rapid intramolecular rearrangements occur in these ions.
37 citations
TL;DR: In this article, the binding energies of CH + 2 (H 2 ) n were smaller than 2 kcal/mol and the cluster CH + 5 (H2 ) n with n = 2 was found to be slightly more stable than those with n ⩾3, in accord with the most stable C S structure predicted by MP2/6-31 G** geometry optimizations.
35 citations
TL;DR: “Effective” temperatures of the Ar+ ions in He buffer are determined based on a Maxwell-Boltzmann distribution of ion energies, and values arising from the chemical thermometer reaction of O+2 with CH4 are examined.
29 citations
TL;DR: The potential energy surface for the CH4+CH4+ reaction system has been calculated with the ab initio method as discussed by the authors, and a stable complex, responsible for the complex mechanism, has been found but is hard to reach.
21 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2017 | 1 |
| 2007 | 1 |
| 2002 | 1 |
| 1993 | 1 |
| 1992 | 2 |
| 1991 | 2 |