Penning ionization electron spectroscopy of anisole, thioanisole, and selenoanisole by collision with He*(23S): Conjugation effects and conformational stability

Kinetic Isotope Effect in Low-Energy Collisions between Hydrogen Isotopologues and Metastable Helium Atoms: Theoretical Calculations Including the Vibrational Excitation of the Molecule

“…Undoubtedly, the collisions of 2 3 S helium with various atomic and molecular partners, especially with hydrogen isotopologues, are of primary importance for astrochemistry. It is also worth noting that there are a considerable number of experimental studies for He* in collisions with more complex molecules (for example, hydrogen sulfide, nitrous oxide, benzene, naphthalene, anthracene, [2,2]-paracyclophane, pyrene, chrysene, coronene, glycine, anisole, thioanisole, and selenoanisole).…”

“…Undoubtedly, the collisions of 2 3 S helium with various atomic and molecular partners, especially with hydrogen isotopologues, are of primary importance for astrochemistry. It is also worth noting that there are a considerable number of experimental studies for He* in collisions with more complex molecules (for example, hydrogen sulfide, 30 nitrous oxide, 31 benzene, 32 naphthalene, 33 anthracene, 33 [2,2]-paracyclophane, 34 pyrene, 35 chrysene, 35 coronene, 35 glycine, 36 anisole, 37 thioanisole, 37 and selenoanisole 37 ). As was shown in ref 2, the kinetic isotope effect in the collisions between light subsystems (such as 4 He* with H 2 , HD, and D 2 ) is dramatic, fundamentally changing the reactivity of the PI process.…”