Electron energy loss and dissociative electron attachment spectroscopy of methyl vinyl ether and related compounds

Elastic electron scattering by ethyl vinyl ether

“…4 includes the 2 A and 2 A symmetry components of the SMC integral elastic cross section, demonstrating that, as expected, the peak near 3 eV arises from the (π → π * ) 2 A shape resonance, while the broad peak near 10 eV contains contributions from both 2 A and 2 A . The 3 eV peak coincides with the anion-production feature observed in the DA spectra [16], supporting the assignment of that feature to the π * resonance. The broad peak near 10 eV is likely a superposition of short-lived C−H and C−C σ * resonances.…”

“…The measured and calculated cross sections generally agree well and both show evidence at 3 eV of the presence of a π * shape resonance that has also been seen in dissociative attachment measurements [16]. In future work, we plan to clarify the role of this resonance in dissociative attachment by combining computational studies of the nucleargeometry dependence of the electron-scattering cross section with additional measurements, including measurements of the temperature dependence of the dissociative-attachment cross sections.…”

“…To our knowledge, the only prior study of low-energy electron interactions with EVE is the work of Bulliard et al [16], who investigated DA to EVE and related compounds. For EVE, they observed the vinylidene (C 2 H …”

Electron stimulated desorption of anions and cations from condensed allyl glycidyl ether

“…Dissociation via the p* shape resonance is thus extremely efficient and dominates the DEA spectrum, though careful inspection of the data of ref. 22 indicates that dissociation via the higher-lying Feshbach resonances remains possible. In non-conjugated compounds where the p-system and C-O are directly connected, dissociation of the p* shape resonance is symmetry-forbidden and only weak shape resonance structure is seen.…”

“…19 Significant work on electron scattering and DEA to gasphase ethers and alcohols has been undertaken by Allan and co-workers. [22][23][24][25][26] As summarized in a recent paper, 26 DEA to saturated ethers may proceed by one of two types of fragmentation process: (i) for 1 o E i o 5 eV anion production occurs in one In unsaturated ethers 22 the presence of a strong p* shape resonance greatly affects the DEA process. For compounds in which the p-system from a CQC bond or aromatic ring, is separated from the ether oxygen by a methylene group, the p-system conjugates with the s* orbital of the O-C bond.…”