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- W2153225503 abstract "Fragmentation reactions during the formation of highly congested dendritic polysilanes can conceivably occur by either anionic or radical mechanisms. In the specific case of the production of [(SiMe3)2SiMeSiMe2]3SiH from the reaction of (ClSiMe2)4Si with (Me3Si)2MeSiLi, the two types of mechanisms were tested by trapping reactions. Product formation was found to be independent of the presence of proton sources, contrary to the expectations of the anionic mechanism. Homolytic fragmentation of the initial product [(SiMe3)2SiMeSiMe2]4Si was supported by the observation of products with the radical trap phenylacetylene. Evidence is presented that the reaction produced, in low yield, this dendritic polysilane, which would be the first such structure with a fourfold-substituted core." @default.
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- W2153225503 date "1999-01-01" @default.
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- W2153225503 title "Anionic vs. radical intermediates in the fragmentation reactions of dendritic polysilanes" @default.
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- W2153225503 doi "https://doi.org/10.1039/a905069h" @default.
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