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KMID : 1059519880320030179
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Journal of the Korean Chemical Society
1988 Volume.32 No. 3 p.179 ~ p.185
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Rates and Mechanism of the Reduction of Vanadium(V) by Benzyl Alcohol in Aqueous Dimethylformamide
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Kim Chang-Su
Lee Woo-Sik
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Abstract
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The reaction of VO2+ with benzyl alcohol in perchloric acid and aqueous dimethylformamide leads to the formation of VO2+ and benzaldehyde. The products, VO2+ and benzaldehyde, are identified by infrared spectroscopy and gas chromatography. Kinetic studies on the reaction of VO2+ with benzyl alcohol have been carried out using visible spectroscopy. The empirical rate equation can be expressed as -d[VO2+]/dt = 2{ko + kH[HClO4]} [VO2+] [C6H5CH2OH] The rate determining step for the reaction is the process for the formation of VO2+ and C6H5CHOH. The activation parameters are ΔH≠ = 13.32 ± 1.73 kcal mol-1 and ΔS≠ = -31.02 ± 0.09 calmol-1K-1 for the oxidation of benzyl alcohol in aqueous dimethylformamide.
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