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  • 1
    Electronic Resource
    Electronic Resource
    Zur Pyrolyse von 1-14C-Pent-1-en (1983)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 325 (1983), S. 283-292 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On the Pyrolysis of 1-14C-Pent-1-eneIn the thermal decomposition of 1-14C-pent-1-ene at 550 to 650°C a mixture of saturated and olefinic hydrocarbons ≤ C6 is formed. The reaction products were analyzed by gaschromatography, the distribution of radioactivity in the main products by radio gaschromatography.The results are discussed on the basis of a conventional radical reaction scheme including 1.4- and 1.5-H-shifts in intermediate alkyl and alkenyl radicals. The distribution of pyrolysis products and of their radioactivity allows a semiquantitative description of the complex decomposition of n-pent-1-en.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19833250215
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  • 2
    Electronic Resource
    Electronic Resource
    Über die Pyrolyse von Pent-1-en-3,3-d2 (1983)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 325 (1983), S. 375-381 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On the Pyrolysis of Pent-1-ene-3,3-d2The distribution of deuterium in the main products of the thermal decomposition of pent-1-ene-3,3-d2 at 550 to 650°C was studied and interpreted. The results include conclusions on kinetic isotope effects, on relative reactivities of different C—H-bonds, and on the importance of nonterminal radical addition. It is shown that butadiene-d2 detected in the isotopically labeled butadiene fraction is a reliable target molecule for the homoallylic rearrangement of the pent-1-ene-4-yl-3,3-d2 radical.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19833250305
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  • 3
    Electronic Resource
    Electronic Resource
    Über die Pyrolyse von Pent-1-en-4,4,5,5,5-d5 (1983)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 325 (1983), S. 699-707 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On the Pyrolysis of Pent-1-ene-4,4,5,5,5-d5The distribution of deuterium in the main products of thermal decomposition of pent-1-ene-4,4,5,5,5-d5 at 550 to 650°C was studied and interpreted. The results include conclusions on kinetic isotope effects, on relative reactivities of different C-H-bonds, on the proportion of terminal and nonterminal addition of methyl radicals, and on the importance of a radical isomerisation reaction. It was shown that the molecular decomposition (Retro-En-Reaction) cannot successfully compete with the radical way in the temperature range above 600°C
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19833250504
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  • 4
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Sulfochlorierung von Paraffinen. V. Kinetische Untersuchungen über die Sulfochlorierung definierter Alkansulfochloride (1979)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 321 (1979), S. 279-292 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Studies on Sulphochlorination of Paraffins. V. Kinetic Studies on the Sulphochlorination of Pure AlkanesulphochloridesThe mixtures of disulphochlorides formed by sulphochlorination of 1-alkanesulphochlorides C4—C9 may be analyzed gaschromatographically after transformation into the corresponding dimethylamides. The individual peaks could be identified in some cases with the aid of pure isomeric disulphochlorides, in other cases they were identified by analogy. The mixtures formed by sulphochlorination of the isomeric heptane sulphochlorides also could be analyzed after transformation into the dimethylamides; the identification of all peaks was possible by comparison of the mixtures obtained from different heptane sulphochlorides.For the alkane sulphochlorides studied the relative rates of sulphochlorination (with reference to n-octane) were determined, and therefore the relative reaction rates of the individual C—H-bonds with reference to one primary C—H-bond of n-octane could be calculated.The results show a geminal or vicinal disubstitution not to take place in noticeable amount. In position 3 or in greater distance the influence of the sulphochloride group on the reactivity of the C—H-bonds is not significant.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19793210214
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  • 5
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Sulfochlorierung von Paraffinen. I Kinetische Untersuchungen über die Erstsulfochlorierung der n-Paraffine C6-C16 (1976)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 318 (1976), S. 1019-1030 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on Sulphochlorination of Paraffins. I. Kinetic Studies on the Monosulphochlorination of the n-Paraffins C6—C16The monosulphochlorides in the reaction mixtures of the sulphochlorination of n-paraffins may be transformed into the gaschromatographic separable sulphonic acid dimethyl amides by reaction with dimethylamine in ether.So the analysis of the isomers in the mixtures from sulphochlorination of n-paraffins C5—C16 becomes possible. The results together with the relative rates of sulphochlorination of n-paraffins C6—C16 (determined by competitive reaction) allow the calculation of sulphochlorination rates of the different C—H-bonds in the n-paraffins C6—C16 relative to one primary C—H-bond in n-octane. For the n-paraffins C6—C8 the relative rates of sulphochlorination of different C—H-bonds agree with the corresponding relative rates of chlorination.
    Notes: Die in Sulfochlorierungsgemischen von n-Paraffinen enthaltenen isomeren Monosulfochloride lassen sich durch Umsetzen mit Dimethylamin/Äther in die gaschromatographisch trennbaren Sulfonsäuredimethylamide überführen. So ist die Isomerenanalyse der Sulfochlorierungsgemische aus den n-Paraffinen C5—C16 möglich. Die Ergebnisse sowie die durch Konkurrenzreaktion ermittelten relativen Sulfochlorierungsgeschwindigkeiten der n-Paraffine C6—C16 gestatten die Berechnung der auf eine primäre C—H-Bindung des n-Octans bezogenen relativen Sulfochlorierungsgeschwindigkeiten der verschiedenen C—H-Bindungen in den Paraffinen C6—C16. Bei den Paraffinen C6—C8 stimmen die relativen Reaktionsgeschwindigkeiten der verschiedenen C—H-Bindungen bei der Sulfochlorierung und bei der Chlorierung innerhalb der Fehlergrenzen überein.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19763180618
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Sulfochlorierung von Paraffinen. IV. Über die Sulfochlorierung von Isobutan (1979)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 321 (1979), S. 107-111 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Studies on Sulphochlorination of Paraffins. IV. On the Sulphochlorination of IsobutaneIn the sulphochlorination of isobutane at -20 to -10°C a mixture of 20-25% tert.-butyl and 75-80% of isobutyl sulphochlorides is formed. The mixture has been analyzed by 1H- and by 13C-n.m.r.-spectroscopy. It is possible to transform the mixture of sulphochlorides into mixtures of the corresponding sulphonates, sulphonic acid methyl esters or sulphonic acid demithylamides. During the work-up of the sulphochlorination mixtures it is necessary to keep the temperature low, because tertiary butyl sulphochloride is desulphonated at a noticeable rate already at temperatures above 35°C.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19793210114
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  • 7
    Electronic Resource
    Electronic Resource
    Zur Pyrolyse von 3-Ethylpent-2-en - Ein weiterer Hinweis auf eine Homoallyl-UmlagerungHerrn Professor Dr. W. Pritzkow zum 60. Geburtstag gewidmet (1988)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 330 (1988), S. 677-682 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Pyrolysis of 3-Ethylpent-2-ene  -  a Further Evidence for a Homoallylic-RearrangementThe pyrolysis of 3-ethylpent-2-ene has been studied under conditions of steam cracking in the temperature range 600 - 700°C in a laboratory scale tubular reactor. The main products of decomposition were methane, 2-ethylbutadiene and isoprene. The majority of products obviously arose from H abstraction and radical addition, typical for radical chain reactions in olefins decomposition including phenomena resulting from allylic resonance. The formation of isoprene, however, could only be explained by a reaction network including a homoallylic rearrangement.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19883300502
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  • 8
    Electronic Resource
    Electronic Resource
    Studies on the Thermal Conversion of Long-chain Alkynes at high temperatures in the gas phaseHerrn Professor Dr. Manfred Mühlstädt zum 60. Geburtstag gewidmet (1989)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 331 (1989), S. 273-284 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In the gas phase pyrolysis of long-chain alkynes C5 to C9 at 773 to 873 K, a remarkable portion of molecular reaction (retro-ene analogous decompositions as well as cycloisomerizations of the parent alkynes to cyclopentenes alkylated in 3-position) takes place besides the thermal conversion of the starting compounds via radical chain processes. The different products were separated by GC and the main products identified by means of different methods. The mechanisms of formation of the major products are discussed.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19893310214
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  • 9
    Electronic Resource
    Electronic Resource
    Pyrolysis of [5-14C]-1-pentene-evidence for homoallylic rearrangements at 873 K (1986)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 18 (1986), S. 159-163 
    Details
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: It was found that the pyrolysis of [5-14C]-1-pentene gives radioactive 1,3-butadiene. This result can be explained in terms of a sequence of free radical rearrangements of 1-penten-3-yl radicals. From this and additional information on isotope distribution in butadiene formed from different deuterated 1-pentenes, we conclude that homoallylic rearrangement of 1-penten-4-yl and 2-penten-5-yl radicals is the dominant route for their consumption.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/kin.550180203
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