- Elucidation of the Electron Transfer Reduction Mechanism of Anthracene Endoperoxides
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The homogeneous and heterogeneous reductions of the endoperoxides 9,10-diphenyl-9,10-epidioxyanthracene (DPA-O2) and 9,10-dimethyl-9,10-epidioxyanthracene (DMA-O2) were investigated, and they were found to undergo a dissociative elec
- Donkers, Robert L.,Workentin, Mark S.
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- Inclusion of Dioxolane by a Tricyclic Diol Host: Structure and Kinetics
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The structure of the inclusion compound formed between trans-9,10-dihydroxy-9,10-diphenyl-9,10-dihydroanthracene (DDDA) and 1,3-dioxolane has been elucidated and its kinetics of enclathration and decomposition investigated.
- Caira, Mino R.,Coetzee, Anita,Nassimbeni, Luigi R.,Toda, Fumio
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p. 1565 - 1578
(2007/10/03)
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- Kinetic studies on the reactions of electrogenerated 9,10-diphenyl-anthracene cation radical with water and alcohols by means of column-electrolytic stopped-flow method
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The reactions of 9,10-diphenylanthracene cation radical (DPA+.) with water and alcohols in acetonitrile (AN) were studied using a novel column-electrolytic stopped-flow spectrophotometric method. The reaction was first-order with respect to DPA+. in all reactions. The reaction orders of other reactants were determined by plotting the logarithms of the apparent first-order rate constants (k(app)'s) against the logarithms of the concentration of reactants. The plot of log k(app) vs. log [alcohols] was linear, and hence the reaction was clearly determined to be second-order. On the other hand, the log k(app) vs. log [water] plot did not show a linear relationship. Similar results were obtained in the reactions of 9,10-dimethylanthracene cation radical with water and methanol. Comparing the results obtained with water and alcohols, and considering the changes in the physicochemical properties of the AN-water medium, it was concluded that the reaction of water was second-order, though it had been believed previously to be first-order. Products of the reactions are trans- and cis-9,10-dialkoxy-9,10-diphenyl-9,10-dihydroanthracene in many cases.
- Oyama,Nozaki,Nagaoka,Okazaki
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