Triplet acetylene: Near infrared electronic absorption spectrum of the c i s isomer, and formation from methylene
- 1 May 1979
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 70 (9) , 4044-4048
- https://doi.org/10.1063/1.438026
Abstract
The electronic absorption spectrum in the gas phase of the metastable 1 3B2 state of acetylene has been observed. Its’ features, including rotational and vibronic structure as well as deuterium isotope effects, agree remarkably well with ab initio theoretical predictions for the 1 3A2–1 3B2 electronic transition of the lowest triplet state in its cis geometry. The metastable species was generated in the Hg‐photosensitized reactions of acetylene, ketene, and diazomethane. In the latter two cases it is probably formed by the reaction 3CH2+3CH2 →C2H2(1 3B2)+H2.Keywords
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