Synthesis of phenylnitroxides bridged by an sp(3)-linkage

Silicon- and carbon-bridged phenylnitroxides were synthesized. They exhibited similar ESR profiles independent of the nature of the sp(3) bridge and the substitution mode of the phenylene units. The spectra revealed a quintet signal at room temperature, which became a broad triplet by lowering the t...

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Bibliographic Details
Published in:Organic letters 2002-02, Vol.4 (3), p.403-406
Main Authors: Ohshita, Joji, Iida, Toshiyuki, Ohta, Nobuaki, Komaguchi, Kenji, Shiotani, Masaru, Kunai, Atsutaka
Format: Article
Language:English
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Summary:Silicon- and carbon-bridged phenylnitroxides were synthesized. They exhibited similar ESR profiles independent of the nature of the sp(3) bridge and the substitution mode of the phenylene units. The spectra revealed a quintet signal at room temperature, which became a broad triplet by lowering the temperature. Accumulated ESR measurements at 77 K led to the successful observation of a signal at Deltam(s) = 2, indicating that the triplet state was involved in this system.
ISSN:1523-7060
1523-7052
DOI:10.1021/ol017093p