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biradical |
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biradical [bī′rad·ə·kəl] (chemistry) A chemical species having two independent odd-electron sites. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The stereochemistry is controlled by a memory of chirality effect via the 1,7-triplet biradical intermediate during the photochemical key step. The vertically expanded portions of the spectra measured at 433 K (downward arrows in Figure 5) indicate signals from the biradical, 2NO-HAS, in both samples. This is, however, prevented to a large extent by its saturation with the stable biradical (air) oxygen. |
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