Kinetics and Mechanism of Oxidation of Butylene-glycol by Dihydroxy- diperiodatonickelate(Ⅳ) with Spectrophotometry in Alkaline Media

Abstract

Abstract: The kinetics of oxidation of β-butylene-glycol(β-BG) and γ-butylene-glycol(γ-BG) by DPN in alkaline medium was studied with spectrophotometry in a temperature range of 25—40 ℃.The reaction was found to be pseudo-first order with respect to DPN and to be fractional order to β-BG and γ-BG. The rate increased with the increase of [OH^-] and decreased with the increase of [IO₄^-]. Adding salts did not affect the rate and no free radical was detected. A mechanism involving a pre-equilibrium of an adduct formation between MPN and BG was proposed. The activation parameters of the rate-determining step were calculated.

Key words: Dihydroxydiperiodatonickelate(Ⅳ), β-Butylene-glycol, γ-Butylene-glycol, Redox reaction, Kinetics and mechanism

CLC Number:

O643.12

TrendMD:

SHAN Jin-Huan, QIAN Jing, WANG Meng-Ge, SHEN Shi-Gang, SUN Han-Wen, WANG An-Zhou . Kinetics and Mechanism of Oxidation of Butylene-glycol by Dihydroxy- diperiodatonickelate(Ⅳ) with Spectrophotometry in Alkaline Media[J]. Chem. J. Chinese Universities, 2004, 25(1): 95.

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Kinetics and Mechanism of Oxidation of Butylene-glycol by Dihydroxy- diperiodatonickelate(Ⅳ) with Spectrophotometry in Alkaline Media

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