The Accelerated Reaction of 2,2-Diphenyl-1-picrylhydrazyl with Cupric 3-(1-Butenyl)-2,4-pentanedionate in Frozen Solutions and Its ESR Spectra
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概要
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The rate enhancements upon freezing in the reaction of 2,2-diphenyl-1-picrylhydrazyl (DPPH) with cupric 3-(1-butenyl)-2,4-pentanedionate (3-α-butenylacetylacetonate) were studied in benzene, dioxane, and cyclohexane. It was observed that the degree of the rate enhancements in frozen solutions varied remarkably with the kind of solvent. The order of the accelerating effect was as follows: benzene>dioxane>cyclohexane. Upon freezing, the hyperfine structure in the ESR spectra of DPPH collapsed into a single line, but the peak-to-peak line width (<I>ΔH<SUB>pp</SUB></I>) changed appreciably with the solvents used. The order of the values of <I>ΔH<SUB>pp</SUB></I> was as follows: cyclohexane>dioxane>benzene. These results suggest that the enhancement of the rate in a frozen solution is due to the increased concentration of reactants in the liquid region existing among the crystalline solvents.
- 公益社団法人 日本化学会の論文
著者
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Tanaka Makoto
Department Of Adult Nursing/palliative Care Nursing Graduate School Of Medicine The University Of To
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Uehara Kaku
Department of Applied Chemistry, College of Engineering, University of Osaka Prefecture
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Murata Niro
Department of Applied Chemistry, College of Engineering, University of Osaka Prefecture
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Kamei Kiyohiro
Department of Applied Chemistry, College of Engineering, University of Osaka Prefecture
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