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Emission spectra of the radical cations of trans-(A2Bg→X2Au) and cis-(A2A2→X2B1)1,3,5-hexatriene in the gas phase

✍ Scribed by M. Allan; J.P. Maier

Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
272 KB
Volume
43
Category
Article
ISSN
0009-2614

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✦ Synopsis

Emission spectra of tram-and cis-1.3.5hexatricnc radical cations have been obtained in the gas phase by controlled clcctron impact excitation. Tbc band systems arc assigned to the x 2Bg + x 2Au and x 2Aa -, 2 lB8 transitions of the cations of the trans and cis isomers. rcspcctivcly. by rcfcrcncc to their photockctron spcctra&and arc compared to tbc laser photodissociation data on these cations. The lifetimes of the lowest vibrational lcvcls of the A states have been measwed to bc 17 f 3 ns and < 6 ns for the cations of the trans and cis isomers, rcspcctivcly. The decay of the x states is unique for large polyatomic radical cations as both the dissociative and radiative channels arc observed.

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