Selective carbon-hydrogen bond fission in partially deuterated 3-methylpentane glasses irradiated at 77 K as studied by electron spin resonance. [Gamma rays]
There exist four possible radicals produced by rupture of the C--H bonds of 3-methylpentane-h/sub 14/, i.e., CH/sub 2/CH/sub 2/CH(CH/sub 3/)CH/sub 2/CH/sub 3/, CH/sub 3/CHCH(CH/sub 3/)CH/sub 2/CH/sub 3/, CH/sub 3/CH/sub 2/C(CH/sub 3/)CH/sub 2/CH/sub 3/, and CH/sub 3/CH/sub 2/CH(CH/sub 2/)CH/sub 2/CH/sub 3/. Results obtained from radiolysis of 3-methyl-d/sub 3/-pentane and 3-methylpentane-3-d/sub 1/ eliminate the possible formation of the two primary radicals and a tertiary radical and lead to the formation of only the secondary radical. On the other hand, radiolysis of 3-methylpentane-2,2,4,4,-d/sub 4/ gives a radical produced by rupture of the tertiary C--H bond, indicating the isotope effect in the bond fission reaction. Photolysis of HI or 3-iodo-3-methylpentane-h/sub 13/ in the four 3-methylpentanes mentioned above shows the same results as the radiolysis of the four 3-methylpentanes. Consideration is given to specific bond rupture in the 3MP systems.
- Research Organization:
- Hiroshima Univ.
- OSTI ID:
- 7292952
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 81:6; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400302 -- Organic Chemistry-- Isotope Effects-- (-1987)
400500 -- Photochemistry
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ALKANES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
DEUTERIUM
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
GAMMA RADIATION
HYDROCARBONS
HYDROGEN ISOTOPES
IONIZING RADIATIONS
ISOTOPE EFFECTS
ISOTOPES
LIGHT NUCLEI
LOW TEMPERATURE
MAGNETIC RESONANCE
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADICALS
RADIOLYSIS
RESONANCE
STABLE ISOTOPES