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The radical cation of 1,4-dihydropentalene and its photochemical formation from bicyclo [3.3.0] octa-2,6-diene-4,8-diyl cation

✍ Scribed by Thomas Bally; Leo Truttmann; Sheng Dai; Jih Tzong Wang; Ffrancon Williams

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 761 KB
Volume: 212
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(93)87122-j

No coin nor oath required. For personal study only.

✦ Synopsis

In contrast to recent claims by Rhodes and Glidewell, comparison of both ESR and electronic absorption spectra shows that the photoproduct of the recently characterized radical cation of bicyclo[ 3.3.0]octa-2,6-diene-4,8-diyl is identical to the 1,4dihydropentalene radical cation, i.e. a linear conjugated tautomer of the former produced by two hydrogen shifts. Ab initio calculation indicate that the tetracyclic diyl radical cation postulated by Rhodes and Glidewell is inaccessible under their experimental conditions (hvg2.2 eV).

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