The MPI-Mainz UV/VIS Spectral Atlas

of Gaseous Molecules of Atmospheric Interest

www.uv-vis-spectral-atlas-mainz.org

Hannelore Keller-Rudek1, Geert K. Moortgat2, Rolf Sander2, Rüdiger Sörensen1

1Satellite Group

2Atmospheric Chemistry Division

Max-Planck Institute for Chemistry
Mainz, Germany

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When referring to the Spectral Atlas, please cite our publication:

Keller-Rudek, H., Moortgat, G. K., Sander, R., and Sörensen, R.: The MPI-Mainz UV/VIS spectral atlas of gaseous molecules of atmospheric interest, Earth Syst. Sci. Data, 5, 365–373, (2013), DOI: 10.5194/essd-5-365-2013

Cross Sections / Alkenes,polyenes+radicals / Alkene radicals / H2C=C / FahrLaufer(1985)_298K_137nm

DATAFILE: H2C=C_FahrLaufer(1985)_298K_137nm.txt
NAME: vinylidene radical
FORMULA: H2C=C
AUTHOR(YEAR): FahrLaufer(1985)
T: 298K
λ: 137nm
BIBLIOGRAPHY: A. Fahr and A.H. Laufer, "Extinction coefficient of H2CC(3B2) at 137 nm", J. Chem. Phys. 83, 908-910 (1985); DOI: 10.1063/1.449509
COMMENTS: Flash photolysis of vinyl chloride at wavelengths greater than 160 nm followed by kinetic spectroscopy in the vacuum ultraviolet

Absorption coefficient k (atm, 298 K)-1 cm-1 (base e) converted to absorption cross section; conversion factor 4.06×10-20

Several absorption lines which have been observed in the 138-nm region for a transient species formed by flash-photolysis of C2H2, have earlier been attributed to the vinylidene radical, see

A.H. Laufer, "An excited state of acetylene: Photochemical and spectroscopic evidence", J. Chem. Phys. 73, 49-52 (1980)

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