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Author Russell, R. L. ♦ Rowland, F. S.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ CARBON 14 ♦ ISOTOPE EFFECTS ♦ KETENES ♦ PHOTOLYSIS ♦ METHYLENE RADICALS ♦ REACTION KINETICS ♦ TRITIUM ♦ EXPERIMENTAL DATA ♦ ISOLATED VALUES ♦ LABELLED COMPOUNDS ♦ BETA DECAY RADIOISOTOPES ♦ BETA-MINUS DECAY RADIOISOTOPES ♦ CARBON ISOTOPES ♦ CHEMICAL REACTIONS ♦ DATA ♦ DATA FORMS ♦ DECOMPOSITION ♦ EVEN-EVEN NUCLEI ♦ HYDROGEN ISOTOPES ♦ INFORMATION ♦ ISOTOPES ♦ KINETICS ♦ LIGHT NUCLEI ♦ NUCLEI ♦ NUMERICAL DATA ♦ ODD-EVEN NUCLEI ♦ ORGANIC COMPOUNDS ♦ ORGANIC OXYGEN COMPOUNDS ♦ PHOTOCHEMICAL REACTIONS ♦ RADICALS ♦ RADIOISOTOPES ♦ YEARS LIVING RADIOISOTOPES ♦ Photochemistry ♦ Organic Chemistry- Isotope Effects- (-1987)
Abstract The photolysis of ketene has been studied with both /sup 14/CH/sub 2/CO and CHTCO, and a new mechanism is suggested for the reactions of triplet methylene in pure ketene. The isotopic experiments are consistent with the set of reactions, (6) plus (8) to (11), /sup 3/CH/sub 2/ + /sup 3/CH/sub 2/ ..-->.. C/sub 2/H/sub 2/ + 2H (8), H + CH/sub 2/CO ..-->.. CH/sub 3/ + CO (9), /sup 3/CH/sub 2/ + CH/sub 3/ ..-->.. C/sub 2/H/sub 4/ + H (10,11), CH/sub 3/ + CH/sub 3/ ..-->.. C/sub 2/H/sub 6/ (6); and not with the earlier proposal of (3) to (6), /sup 3/CH/sub 2/ + CH/sub 2/CO ..-->.. CH/sub 3/ + CHCO (3), CHCO + CHCO ..-->.. C/sub 2/H/sub 2/ + 2CO (4), CH/sub 3/ + CHCO ..-->.. C/sub 2/H/sub 4/ + CO (5). The formation of atomic hydrogen rather than molecular hydrogen in (8) has important consequences for interpretation of the flash photolysis of ketene.
Educational Use Research
Learning Resource Type Article
Publisher Date 1979-08-09
Publisher Department Univ. of California, Irvine
Publisher Place United States
Journal J. Phys. Chem.
Volume Number 83
Issue Number 16
Organization Univ. of California, Irvine


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