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- W2027698336 abstract "Cryogenic techniques coupled with electron spin resonance detection methods have made it possible to produce long-lived trapped hydrogen atoms in inert matrices at 4 K and to study their reactions with neutral molecules and molecular fragments when the temperature is raised to the point where they diffuse. Under the matrix conditions H atoms abstract H rapidly from all carbon-hydrogen bonds (except those of CH4) by quantum mechanical tunnelling, even though such reactions would be precluded if the classical activation energy prevailed. Thermal H atoms in CH4 at 15 K add to CO to form the HCO radical, and to O2 to form the HO2 radical. When exposed to the appropriate wavelength of light these and other radicals, including CH3, C2H5 and C2H3 lose H by photoelimination. The H atoms are produced in the matrices by X radiolysis, γ-ray radiolysis, or photolysis of a hydrogen halide. This paper reviews some of the most significant current findings in the field from different laboratories." @default.
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- W2027698336 date "1982-07-01" @default.
- W2027698336 modified "2023-09-24" @default.
- W2027698336 title "H atoms in CH4 and Xe matrices at cryogenic temperatures" @default.
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- W2027698336 doi "https://doi.org/10.1016/0011-2275(82)90035-2" @default.
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