Isomeric Effects in the Gas-Phase Reactions of Dichloroethene, C2H2Cl2, with a Series of Cations

Mikhailov, Victor A.; Parkes, Michael A.; Tuckett, Richard P.; Mayhew, Chris A.

doi:10.1021/jp060093s

Cited by 19 publications

(58 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, collisional techniques based on electron and ion impact had varying degrees of success in linking changes in molecular geometry to dynamical processes. In most cases, the isomers produced similar mass spectra [3][4][5][6]. Electron scattering from isomers has only recently demonstrated convincing differences in the absolute total cross sections in the low-energy region [7].…”

mentioning

confidence: 92%

High-harmonic spectroscopy of molecular isomers

et al. 2011

View full text Add to dashboard Cite

show abstract

mentioning

confidence: 92%

High-harmonic spectroscopy of molecular isomers

et al. 2011

View full text Add to dashboard Cite

show abstract

“…The upper limit arises due to the possible presence of an exit-channel barrier and/or a kinetic shift; if both are zero, the conversion is exact. This procedure was developed for interpretation of photoionisation yields rather than state-selected TPEPICO yields, but we have shown that the procedure is equally valid for both experiments [29,30]. For the vibrational frequencies of SF 5 + and SF 4 Cl + needed for these conversions, values for the isoelectronic neutral molecules PF 5 and PF 4 Cl were used [31,32]; the differences of the vibrational frequencies due to a change in reduced mass of the sulphur and phosphorus analogues make negligible difference to these conversions.…”

Section: Data Analysis and Energeticsmentioning

confidence: 99%

Vacuum-UV and electron dissociative ionisation studies of SF5Cl

Chim

Cicman

Märk

et al. 2007

International Journal of Mass Spectrometry

View full text Add to dashboard Cite

“…The only ion which shows a significant variation from the TPEPICO branching ratios is N + (RE = 14.53 eV), as observed in previous work. 1,14 It appears that reaction with N + causes much 'softer' ionisation ( i.e. less fragmentation)…”

Section: Comparison Of Tpepico and Sift Branching Ratiosmentioning

confidence: 99%

Selected ion flow tube cation–molecule reaction studies and threshold photoelectron photoion coincidence spectroscopy of cyclic-C5F8

Parkes

Ali

Tuckett

et al. 2007

Phys. Chem. Chem. Phys.

Self Cite

View full text Add to dashboard Cite

The product ion branching ratios and rate coefficients have been measured using a selected ion flow tube (SIFT) at 298 K for the bimolecular reactions of cyclic-C\(_5\)F\(_8\) with several atomic and molecular cations. The majority of reactions occur at the collisional rate calculated by the modified average dipole orientation theory, with the exception of H\(_2\)O\(^+\) for which the reaction efficiency is only 55 %. Apart from H\(_2\)O\(^+\) and N\(^+\), the similarity of the product ion branching ratios determined from threshold photoelectron photoion coincidence (TPEPICO) and ion-molecule data suggests that long-range electron transfer is the dominant mechanism for reactions involving ions with recombination energies between 12 and 17 eV. For N+, the product ion branching ratios are very different to those produced by photoionisation; this result may be explained if some of the N-atom products are formed electronically excited. The onset of an ionisation signal of \(c\)-C\(_5\)F\(_8\) measured by TPEPICO spectroscopy occurs at 12.25 ± 0.05 eV. This is much higher than the value of the first adiabatic ionisation energy determined from electron ionisation (11.24 ± 0.10 eV), He (I) photoionisation (11.30 ± 0.05 eV), and an independent high resolution threshold photoelectron spectrum (11.237 ± 0.002 eV). The ground electronic state of \(c\)-C\(_5\)F\(_8^+\) has very weak intensity under threshold electron conditions. The TPEPICO spectrum of \(c\)-C\(_5\)F\(_8\) recorded from 1223 eV shows detection of the parent ion and the daughter ions C\(_4\)F\(_6^+\) and C\(_5\)F\(_7^+\), with their appearance energies increasing in this order. Ion yield curves and branching ratios have been determined. Using Gaussian 03, the enthalpy of formation of \(c\)-C\(_5\)F\(_8\) at 298 K has been determined to be \(\sim\)1495 kJ mol\(^{-1}\

show abstract

Isomeric Effects in the Gas-Phase Reactions of Dichloroethene, C₂H₂Cl₂, with a Series of Cations

Abstract: : A study of the reactions of a series of gas-phase cations (NH the results suggest that the formation of a collision complex at short range between these ions and C 2 H 2 Cl 2 is responsible for the observed effects.

Cited by 19 publications

References 47 publications

High-harmonic spectroscopy of molecular isomers

High-harmonic spectroscopy of molecular isomers

Vacuum-UV and electron dissociative ionisation studies of SF5Cl

Selected ion flow tube cation–molecule reaction studies and threshold photoelectron photoion coincidence spectroscopy of cyclic-C5F8

Contact Info

Product

Resources

About