40529-20-2Relevant articles and documents
Electrochemistry of electron transfer probes. α-aryloxyacetoveratrones and implications for the mechanism of photo-yellowing of pulp1
Andersen, Mogens L.,Wayner, Danial D. M.
, p. 830 - 836 (2007/10/03)
Standard potentials (Eo) of a series of substituted α-aryloxyacetoveratrone derivatives have been determined from a correlation of the 13C NMR chemical shifts of the carbonyl group and a similar correlation (Eo vs. 13C NMR shifts) within a series of α-anilinoacetoveratrones. Using these potentials the rate constants for fragmentation of the radical anions were determined by digital simulation of the voltammetric waves. The rate contants for C O cleavage in the radical anions correlate with the pKa of the corresponding phenols. The fragmentations are all in the activated region of a general free energy relationship for this class of compound (α = 0.5). The standard potential and rate constant for fragmention of the α-guaiacoxyacetoveratrone radical anion also were determined. This species is a model compound for one of the lignin substructures. The implication of these results on the currently accepted mechanism for photo-yellowing of lignin rich paper is discussed.
Solvent reorganization as a governing factor in the kinetics of intramolecular dissociative electron transfers. Cleavage of anion radicals of α-substituted acetophenones
Andrieux, Claude P.,Savéant, Jean-Michel,Tallec, André,Tardivel, Robert,Tardy, Caroline
, p. 9788 - 9789 (2007/10/03)
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