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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Russian chemical bulletin 41 (1992), S. 1750-1755 
    ISSN: 1573-9171
    Keywords: vinyl monomers ; radical addition ; reactivity ; correlation schemes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The concept of the apparent electronegativity of a reaction site has been introduced. This has been used to develop a new scheme for calculating the relative rate constants of addition of radicals with different structures to vinyl monomers. The parameters of the scheme are given for 40 reagents. The results of a comparison of calculated and literature rate constants of addition are presented.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Russian chemical bulletin 42 (1993), S. 640-644 
    ISSN: 1573-9171
    Keywords: vinyl monomers ; radical addition ; MO calculations ; transition states of reaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The transition states for the addition of.CH3, CH3O.,.CCl3,.CF3, and HOO. radicals to the Cβ and Cα atoms of ethylene, propylene, styrerie, acrylonitrile, methyl acrylate, vinyl acetate, and vinyl- and vinylidene chlorides were calculated using the MNDO method. A satisfactory correlation between the heats of reaction and activation energies was found. The calculated coefficients of proportionality, 0.4–0.5, are twice as high as those in the Polyani—Semenov equation. The calculated heat of reaction of radical addition was shown to be as «strong» an index of reactivity as the calculated activation barrier.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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