Radiolysis of Isoprenoids: 2,6-Dimethyloctane

Radiolysis yields were determined for 2,-dimethyloctane, 2,6- dimethyloctadiene-2,6, and squalene. In 2,6dimethyloctane hot hydrogen atoms abstract hydrogen on their first collision with a neighbor molecule to produce hydrogen gas. The latter diffuse, react competively with solvent and solute, and p...

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Bibliographic Details
Published in:Nature (London) 1963-11, Vol.200 (4908), p.754-755
Main Authors: SHELBERG, WESLEY E., PESTANER, JAMES F.
Format: Article
Language:English
Subjects:
ACTIVATION
ALKANES
ALKENES
ALKYL RADICALS
ATOMS
BINDING ENERGY
CHEMICAL REACTIONS
CHEMISTRY
COLLISIONS
DECOMPOSITION
DIFFUSION
DISPROPORTIONATION
GASES
Humanities and Social Sciences
HYDROGEN
ION RECOMBINATION
METHYL RADICALS
MOLECULES
multidisciplinary
OCTANE
RADIATION CHEMISTRY
RADIOLYSIS
Science
Science (multidisciplinary)
SQUALENE
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Summary:Radiolysis yields were determined for 2,-dimethyloctane, 2,6- dimethyloctadiene-2,6, and squalene. In 2,6dimethyloctane hot hydrogen atoms abstract hydrogen on their first collision with a neighbor molecule to produce hydrogen gas. The latter diffuse, react competively with solvent and solute, and produce hydrogen gas by abstraction or self-combination. In some cases, an activated hydrogen molecule may detach a hydrogen molecule, leaving a biradical or olefin. Caged alkyl radicals from C- C bond scission recombine or disproportionate to a paraffin plus an olefin. Freely diffusing alkyl radicals combine to produce paraffins or disproportionate. Finally, it is postulated that molecules of 2,6-dimethyloctadiene-2,5 and squalene undergo C-H and C-C bond scission on radiolysis to produce hydrogen, methyl, and olefinic radicals.
ISSN:0028-0836
1476-4687
DOI:10.1038/200754a0