Photochemistry of singlet and upper triplet states of dibenzocycloheptadienone

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DOIResolve DOI: http://doi.org/10.1021/jo00247a031
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TypeArticle
Journal titleJournal Of Organic Chemistry
ISSN0022-3263
Volume53
Issue12
Pages28262829; # of pages: 4
AbstractDibenzocycloheptadienone (1) undergoes Norrish type I a-cleavage from both its first excited singlet state and an upper triplet state with quantum yields of 0.02 and 0.04, respectively. The major product in both cases is dihydrophenanthrene formed by loss of carbon monoxide from the initial biradical, followed by ring closure. The triplet state of ketone 1 has been characterized by laser flash photolysis. Photolysis of the triplet leads to irreversible bleaching and the generation of a short-lived (-350 ns) transient at 325 nm, which is tentatively assigned to biradical 3.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Chemical Process and Environmental Technology
Peer reviewedNo
Identifier10008226
NPARC number12337941
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Record identifier3c68679c-70c2-4c66-b0b8-24e2cf3a7260
Record created2009-09-10
Record modified2016-05-09
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