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The benzene-sensitized cycloreversion of 9,10-peroxy,9,10-dimethylanthracene in solution

✍ Scribed by B. Stevens; W.A. Glauser

Book ID: 103024960
Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 465 KB
Volume: 129
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(86)80181-6

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✦ Synopsis

Rates of 9,lOdimethylanthracene (DMA) formation have been determined for Nz-purged solutions of 9,10-peroxy-9,lOdimethylanthracene (DMAPO) and benzene (B) in dichloromethane at 254 nm as a function of concentration of DMAPO and of B. The rate equation is integrated to accommodate time-dependent absorption of the actinic radiation by DMA, necessary even for cycloreversions of 1%. The data are quantitatively consistent with triplet benzene sensitized adiabatic cycloreversion from the endoperoxide triplet (T,) state with an estimated efficiency of 0.16 i: 0.06.

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