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- Title
Muonium addition to vinylaromatics and to diacetylenes: formation and stability of arylethyl/vinylcyclohexadienyl and alkynylvinyl radicals.
- Authors
Rhodes, C.J.; Morris, H.; Reid, I.D.
- Abstract
According to TF μSR measurements and PM3 M.O.calculations, free radicals formed by muonium addition to styrene, 1 vinylnaphthalene and 2 vinylnaphthalene are of the arylethyl type ( ArCHCH2Mu\mbox$\bullet$) since it is energetically considerably more favourable for Mu\mbox$\bullet$ to add to the vinyl group than to the aromatic rings. In contrast, Mu\mbox$\bullet$ adds to 9 vinylanthracene at the 10 position yielding the 4 vinyldibenzocyclohexadienyl radical, which is more stable by ca 7 kcal/mol than the 9 anthrylethyl radical. For diacetylenes (i.e. MeC4Me) the propensity for muonium addition is to the terminal carbon atoms, but the choice is less clear for Me3SiC4SiMe3. For PhC4Ph, 3 radicals are detected and are assigned to the C1, C2 and ortho ring adducts, with the couplings (and yields): 334 (5.7%), 389 (4.2%), 439 (3.6%).
- Publication
Hyperfine Interactions, 1997, Vol 106, Issue 1-4, p203
- ISSN
0304-3843
- Publication type
Article
- DOI
10.1023/A:1012654211051