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  • 1
    Electronic Resource
    Electronic Resource
    Die Bildungsenthalpie des Allyl- und Methallyl-Radikals (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 1453-1460 
    Details
    ISSN: 0009-2940
    Keywords: Shock tube technique ; Oxygen scavanger ; Heat of formation ; Allyl resonance energy ; Radical disproportionation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The Heat of Formation of the Allyl and Methallyl RadicalThe decomposition of 1,5-hexadiene (1), 2-methyl-1,5-hexadiene (7), and 2,5-dimethyl-1,5-hexadiene (5) into allyl- (2) and methallyl radicals (6) was studied by means of the shoke tube technique with and without oxygen as scavanger. From these data and from the temperature dependence of the equilibria 1 ⇌ 2 and 5 ⇌ 6, measured between 600 and 800°C, the heat of formation of the allyl (2) and methallyl radical (6) as well as the activation parameters for the recombination and disproportionation of these radicals have been deduced.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240621
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Zur Energie-Delle von Diradikalen; III1) 2,3,5,6-Tetramethylen-1,4-cyclohexadiyl (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 2751-2760 
    Details
    ISSN: 0009-2940
    Keywords: Diradicals ; Oxygen trapping ; Shock-tube technique ; Heats of formation ; Heats of hydrogenation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Energy Well of Diradicals, III1). - 2,3,5,6-Tetramethylene-1,4-cyclohexadiylGasphase thermolysis of ketone 1 leads to title diradical 3, which in the presence of oxygen yields 5 and peroxides. Assuming that the trapping reaction is collision-controlled, from the temperature dependence of the competing processes an activation enthalpy of 23 kcal/mol is derived for the recombination of the diradical. By the same technique starting from 5 the heat of formation of the diradical has been determined, ΔH°f(g)=100.8 kcal/mol.
    Additional Material: 10 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911241218
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    o-Chinodimethan ⇄ Benzocyclobuten-Gleichgewicht; Sauerstoff-Abfang-Technik (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1357-1358 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: o-Quinodimethane ⇄ benzocyclobutene Equilibrium; Oxygen Trapping TechniqueBy trapping experiments with oxygen and by determining the temperature dependance of the equilibrium 1 ⇄ 2 the activation parameters for the mutual interconversion of 1 and 2 are determined and are compared with literature values.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210723
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    Paper (German National Licenses)
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