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

Substance:  1,3-butadiyne			Other Names: diacetylene

Formula:  C4H2				CAS-No.: 460-12-8

Study: photochemistry, absorption coefficients

                
Authors: S. Glicker, H. Okabe

Title: Photochemistry of diacetylene 

Journal/Source: J. Phys. Chem., 91(2), 437-440, (1987); DOI: 10.1021/j100286a036


Data: (diagram, table, disk): 

Wavelength range: 183 - 260 nm

Resolution: 

Temperature: 

Temperature dependence: 

Pressure:


Comments: Absorption coefficients of C4H2 have been measured in the 183-260-nm wavelength region.
The photochemistry of diacetylene has been studied at 147.0, 184.9, 228.8, and 253.7 nm.
The primary dissociative processes at 147 nm are: C4H2 + hv --> C4H + H, C4H2 + hv --> C2H2 + C2, and C4H2 + hv --> 2C2H 
with quantum yields of 0.2, 0.1, and 0.03, respectively.

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