science-softCon uv/vis spectra data base;		www.uv-spectra.de; (C) science-softCon 2008

Substance:  ethyne				Other Names: acetylene

Formula: C2H2					CAS-No.: 74-86-2

Study: photolysis

                
Authors: H. Okabe

Title: Photochemistry of acetylene

Journal/Source: Can. J. Chem., 61, 850, (1982)


Data: (diagram, table, disk): diagram

Wavelength range: ~ 130 - 190 nm

Resolution: 

Temperature:

Temperature dependence:

Pressure:


Comments: Photochenlical and fluorescence studies of acetylene initiated by absorption of light in the vacuum ultraviolet have been
described. The photochemical primary process consists of (1) the formation of C2 + H2, (2) the production of C2H + H, and
(3) the formation of a metastable acetylene. The quantum yield of process (1) is about 0.1 and that of process (2) is 0.06 at
1849 A and 0.3 at 1470 A.
A quasicontinuous emission is obscrvcd in the 4000 to 6000 A region when acetylene is exposed to incident wavelengths below 1305 A.

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