Photoelectron spectrum of the propargyl radical in a supersonic beam

Journal Article · Wed Oct 31 23:00:00 EST 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100385a007· OSTI ID:6080808

Minsek, D W; Chen, P ^[1]

---

1. Harvard Univ., Cambridge, MA (USA)

The laser photoionization mass and photoelectron spectra of propargyl radical (l-C{sub 3}H{sub 3}) and two partially deuterated isotopomers are measured in a supersonic molecular beam. Radicals were produced by flash pyrolysis in a heated supersonic tube nozzle. The PES exhibits an intense origin band at 8.67 {plus minus} 0.02 eV, which is assigned to the adiabatic ionization potential previously seen by electron impact mass spectroscopy. A second photoelectron band at higher energy is assigned to the previously unobserved first excited state of the propargyl cation. One highly anharmonic vibrational progression in the cation is also observed.

• OSTI ID: 6080808
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:22; ISSN JPCHA; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKYL RADICALS
BEAMS
COMBUSTION PRODUCTS
DATA
ELECTRON EMISSION
EMISSION
EXPERIMENTAL DATA
INFORMATION
IONIZATION
MASS SPECTRA
MEASURING METHODS
MOLECULAR BEAMS
NUMERICAL DATA
PHOTOELECTRIC EMISSION
PHOTOIONIZATION
PROPARGYL RADICALS
RADICALS
SPECTRA