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Excited electronic states of ketene

✍ Scribed by Robert P. Frueholz; Wayne M. Flicker; Aron Kuppermann

Publisher: Elsevier Science
Year: 1976
Tongue: English
Weight: 358 KB
Volume: 38
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(76)80254-0

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✦ Synopsis

The clectran-impact ener&y-loss spectrum of ketene has been measured at impact energics of 30 CV end 50 cV, and SGI~tering angles varying from 5" to 80". Transitions hzvc been observed at 3.7.5.3, and 5.86 cV. These values are in excellent agreement with recent high quality ab initio calculations. They arc assigned, rcspcctivcly, to an n + X* 2 'A I + tion,ax+rr*%'A, d3 r A2 transi-AI tmnsition, and an n -c 3s singlet -+ singlet Rydberg transition. The results do not preclude the cxistcncc of an !?'A1 -+ 3Az transition near 3.6 eV underlying the low-tmx~~ side of the x'A1 -+ ' A2 excitation. Howcvcr.

no evidence is found for the presence of a triplet state with maximum intensity transition eneqq lower than 3.4 eV.

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