The 4875 Å band system of cis glyoxal

DOI	Resolve DOI: https://doi.org/10.1139/p71-037
Author	Search for: Currie, G. N.¹; Search for: Ramsay, D. A.¹
Name affiliation	National Research Council Canada
Format	Text
Type	Article
Journal title	Canadian Journal of Physics = Revue canadienne de physique
ISSN	0008-4204 1208-6045
Volume	49
Issue	3
Pages	317–322
Abstract	The 4875 Å band of glyoxal has been photographed in absorption under high resolution and a rotational analysis carried out. The band is of type C and the principal molecular constants are: A′ = 0.9069 cm−1, B′ = 0.1983 cm−1, C′ = 0.1627 cm−1, A″ = 0.8910 cm−1, B″ = 0.2066 cm−1, C″ = 0.1681 cm−1, v0 = 20 507.57 cm−1. The A-rotational constants are smaller by a factor of ~2 than the constants found earlier for trans glyoxal. The new results are consistent with the assignment of the band to an allowed 1B1–1A1 (π*–n) transition of cis glyoxal. Temperature studies indicate that the cis isomer lies 1125 ± 100 cm−1 above the trans isomer. This is the first time that cis glyoxal has been detected experimentally.
Publication date	1971-02
Publisher	NRC Research Press
Note	The authors were affiliated with the National Research Council of Canada, Division of Physics when they authored this article.
Language	English
Peer reviewed	Yes
NRC number	NRCC 11655
NPARC number	23002984
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Record identifier	2d3a4615-22e4-49ea-bbeb-1fcbbb9ef6eb
Record created	2018-04-04
Record modified	2020-03-13