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  • Exobiology  (2)
  • Polymer and Materials Science  (1)
  • 5'-O-demethyl-8-O-methyl-dioncophylline A
  • 1995-1999
  • 1985-1989  (3)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Radical ions as chain carriers in polymerization reactions (1985)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 12 (1985), S. 105-123 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Certain polymerization reactions show the formation of medium molecular weights at the beginning of the reaction, although they can be considered to be polycondensations. The principle of equal reactivity of the end groups is not given in this case. Intermediates more reactive than the monomer are formed during the reaction. Poly(oxy-2,6-dimethyl-l,4-phenylene), poly(l,4-phenylene sulfide) and poly(l,4-phenylene) are examples of this type of reaction. The formation of radical ions in these reactions is discussed and they are compared to Bunnett's SRN1-reactions.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1985.020121985110
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Unknown
    The C4H7+ cation. A theoretical investigation (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The potential energy surface of the C4H7+ cation has been investigated with ab initio quantum chemical theory. Extended basis set calculations, including electronic correlation, show that cyclobutyl and cyclopropylcarbinyl cation are equally stable isomers. The saddle point connecting these isomers lies 0.6 kcal/mol above the minima. The global C4H7+ minimum corresponds to the 1-methylallyl cation, which is 9.0 kcal/mol more stable than the cyclobutyl and the cyclopropylcarbinyl cation and 9.5 kcal/mol below the 2-methylallyl cation. These results are in excellent agreement with experimental data.
    Keywords: Exobiology
    Type: Journal of the American Chemical Society (ISSN 0002-7863); Volume 110; 22; 7325-8
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Structure of the 2-norbornyl cation (1989)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: No abstract available
    Keywords: Exobiology
    Type: Journal of the American Chemical Society (ISSN 0002-7863); Volume 111; 1527-8
    Format: text
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    NASA TECHNICAL REPORTS
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