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  • Ausloos, P.  (7)
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  • 1
    Online Resource
    Online Resource
    Canadian Science Publishing ; 1955
    In:  Canadian Journal of Chemistry Vol. 33, No. 1 ( 1955-01-01), p. 39-46
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 33, No. 1 ( 1955-01-01), p. 39-46
    Abstract: The photolysis of biacetyl has been reinvestigated. The results are, in general, in excellent agreement with those of Blacet and Bell. Curvature occurs at low temperatures in the Arrhenius plot of [Formula: see text][Biacetyl] , and this is attributed to wall reactions, and to the disproportionation reaction[Formula: see text]Azomethane–biacetyl mixtures have been photolyzed to give further information on these points. An activation energy of 8.5 kcal. has been found for the reaction of methyl radicals with biacetyl.
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    RVK:
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1955
    detail.hit.zdb_id: 1482256-8
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  • 2
    Online Resource
    Online Resource
    Canadian Science Publishing ; 1955
    In:  Canadian Journal of Chemistry Vol. 33, No. 1 ( 1955-01-01), p. 47-55
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 33, No. 1 ( 1955-01-01), p. 47-55
    Abstract: The photolysis of acetone has been investigated at room temperature using low pressures and high intensities. In addition an investigation was made of the photolysis of azomethane–acetone mixtures. The results indicate that the curvature at low temperatures of Arrhenius plots of[Formula: see text][Acetone] is due to two causes (a) a reaction between methyl radicals and adsorbed acetone and (b) to the occurrence of the disproportionation reaction [Formula: see text]Confirmatory evidence for wall effects was obtained from experiments at low pressures and higher temperatures.
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    RVK:
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1955
    detail.hit.zdb_id: 1482256-8
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  • 3
    Online Resource
    Online Resource
    Canadian Science Publishing ; 1955
    In:  Canadian Journal of Chemistry Vol. 33, No. 1 ( 1955-01-01), p. 31-38
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 33, No. 1 ( 1955-01-01), p. 31-38
    Abstract: Azomethane has been photolyzed in the presence of CH 3 CHO and CH 3 CDO, and the results compared with the direct photolysis of the aldehydes. The activation energies found were 6.8 and 7.8 kcal./mole, respectively, for the reactions[Formula: see text]The results furnish evidence that only an acyl hydrogen is captured. Evidence has also been found for the occurrence of wall reactions and the disproportionation reaction[Formula: see text]
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    RVK:
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1955
    detail.hit.zdb_id: 1482256-8
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  • 4
    Online Resource
    Online Resource
    Canadian Science Publishing ; 1955
    In:  Canadian Journal of Chemistry Vol. 33, No. 10 ( 1955-10-01), p. 1530-1535
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 33, No. 10 ( 1955-10-01), p. 1530-1535
    Abstract: The photolysis of acetic acid (CH 3 COOD) vapor has been investigated in the temperature range from room temperature to 285 °C. Since CH 3 D formation is independent of temperature, it is certain that the primary process[Formula: see text]occurs to the extent of about 10%. The results are complex and suggest that three other primary processes may occur, viz.[Formula: see text] The abstraction reaction[Formula: see text]is of importance, and the results indicate that it has an activation energy of 10.2 kcal., and a steric factor of the order of 10 −3 .
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    RVK:
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1955
    detail.hit.zdb_id: 1482256-8
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  • 5
    Online Resource
    Online Resource
    Canadian Science Publishing ; 1954
    In:  Canadian Journal of Chemistry Vol. 32, No. 6 ( 1954-06-01), p. 593-597
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 32, No. 6 ( 1954-06-01), p. 593-597
    Abstract: The hydrogen-abstraction reactions of methyl and ethyl radicals from diethyl ketone have been studied in the temperature range 25 to 160 °C. Azomethane and azoethane were used as photochemical sources of methyl and ethyl radicals. The activation energies found were 7.0 and 7.6 kcal., respectively, for the reactions:[Formula: see text][Formula: see text] If the combination of both methyl and ethyl radicals is assumed to occur at every collision, the steric factors for the two reactions are E 1  = 7.4 × 10 −4 , E 2  = 7.1 × 10 −4 .
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    RVK:
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1954
    detail.hit.zdb_id: 1482256-8
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  • 6
    Online Resource
    Online Resource
    Canadian Science Publishing ; 1955
    In:  Canadian Journal of Chemistry Vol. 33, No. 6 ( 1955-06-01), p. 1062-1068
    In: Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 33, No. 6 ( 1955-06-01), p. 1062-1068
    Abstract: Methyl ethyl ketone has been photolyzed at temperatures between 25° and 240 °C., at varying pressures and intensities. Azomethane has also been photolyzed in the presence of methyl ethyl ketone. It is concluded that the ratio of disproportionation to recombination for a methyl and an ethyl radical is of the order of 0.04. The activation energy for the abstraction of hydrogen from the ketone by methyl is 7.4 ± 0.1 kcal., and by ethyl it is 8.0 ± 0.1 kcal.
    Type of Medium: Online Resource
    ISSN: 0008-4042 , 1480-3291
    RVK:
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1955
    detail.hit.zdb_id: 1482256-8
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  • 7
    Online Resource
    Online Resource
    Wiley ; 1954
    In:  Bulletin des Sociétés Chimiques Belges Vol. 63, No. 1-2 ( 1954-01), p. 87-99
    In: Bulletin des Sociétés Chimiques Belges, Wiley, Vol. 63, No. 1-2 ( 1954-01), p. 87-99
    Abstract: The photolysis of azoethane has been investigated over the temperature range 26 to 178 °C. An analogous reaction mechanism to that for the photolysis of diethylketone ( 1 ) has been proposed to explain the results. For the activation energy of the reaction C 2 H 5 + C 2 H 5 N 2 C 2 H 5 a value of 7.5 kcal. /mole has been obtained, assuming that the combination reaction of two ethyl radicals has an activation energy of zero. The ratio of disproportionation to recombination of ethyl radicals is 0.13 ± 0.02.
    Type of Medium: Online Resource
    ISSN: 0037-9646 , 0037-9646
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 1954
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