Journal ArticleDOI
Rate Constants for the Addition of 2-Hydroxy-2-propyl Radicals to Alkenes in Solution studied by laser flash photolysis
TLDR
In this article, the absolute rate constants for the addition of the highly nucleophilic 2-hydroxy-2-propyl radical to eight fast-reacting 1-and 1,1-disubstituted alkenes in MeOH at room temperature have been determined by laser flash photolysis.Abstract:
Absolute rate constants for the addition of the highly nucleophilic 2-hydroxy-2-propyl radical to eight fast-reacting 1- and 1,1-disubstituted alkenes in MeOH at room temperature have been determined by laser flash photolysis. Also the absorption spectra of the 2-hydroxy-2-propyl and the benzylic and alkyl-type adduct radicals are presented. The rate constants were obtained using various methods for the analysis of the kinetic traces and support earlier findings.read more
Citations
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Journal ArticleDOI
Acrylate radicals: Direct observation and reactivity
TL;DR: In this paper, a new procedure for the direct study of the chemical reactivity of acrylate radicals is developed, which is produced by the addition of an aminoalkyl radical to an acrylated double bond and directly observed by transient absorption spectroscopy.
Journal ArticleDOI
Interaction of monomer radicals with nitroxides: A new access to the radical-radical combination rate constants
TL;DR: In this article, an aminoalkyl radical is added to the corresponding monomer unit to obtain a strong absorption in the near UV/visible part of the spectrum allowing to directly follow their interaction with different nitroxides usable in nitroxide mediated polymerization.
Journal ArticleDOI
Reversed triplet mechanism CIDEP in triplet azoalkanes
Anton Savitsky,H. Paul +1 more
TL;DR: In this paper, the CIDEP of transient alkyl radicals, generated by triplet sensitization of symmetrical azoalkanes, was studied by time-resolved EPR (TREPR) spectroscopy.
Journal ArticleDOI
Comparison of mechanistic models for correlation of activation energies of liquid‐phase addition of carbon‐centered radicals to terminal olefins
TL;DR: The performance of different models for the influence of enthalpy and polar effects on the activation energies for liquid-phase addition of carbon-centered radicals to terminal olefins is compared for the extensive data set from the Fischer group, supplemented by additional data as discussed by the authors.
Journal ArticleDOI
A comparative time-resolved CW EPR and FT EPR investigation of the addition of 2-hydroxy-2-propyl radicals to acrylate and methacrylate monomers
TL;DR: In this paper, the addition of 2-hydroxy-2-propyl radicals to n-butyl methacrylate was investigated by time-resolved continuous wave electron paramagnetic resonance (TR CW EPR) and TR FT EPR.
References
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Journal ArticleDOI
Which Factors Determine the Reactivity and Regioselectivity of Free Radical Substitution and Addition Reactions
TL;DR: In this paper, the relative importance of bond strength, steric effects, and polarity in determining the rate and orientation of free radical subsitution and free radical addition reaction is considered.
Journal ArticleDOI
Transmission Filters for the Ultraviolet
TL;DR: A set of band pass filters for the 2400–3800A region of the ultraviolet is developed, which have a half-width of 200A and a maximum transmission of 30 percent, on the average.
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