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High-resolution HeI photoelectron spectrum of acetonitrile

✍ Scribed by M. Gochel-Dupuis; J. Delwiche; M.-J. Hubin-Franskin; J.E. Collin

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 536 KB
Volume: 193
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(92)85680-9

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✦ Synopsis

The photoelectron spectrum of acetonitrile has been revisited under high resolution and high sensitivity using the He1 resonance line. Ionization of the three outermost valence molecular orbitals has been discussed in terms of ionization energies and vibrational frequencies. Additional vibration terms have been reported. Ionization of the 2e molecular orbital is accompanied by a Jahn-Teller effect involving the vg degenerate mode. The second band of the spectrum shows weak features assigned to the excitation of the degenerate modes vg and ug. The second excited ionic state has been suggested to be of E symmetry.

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