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KMID : 1059519880320060528
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Journal of the Korean Chemical Society
1988 Volume.32 No. 6 p.528 ~ p.535
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Oxygen Ring Formation Reaction of Mono-Oxo Bridged Binudear Molybdenum (Ⅴ) Complex (Ⅲ). Reaction of [Mo2O3(Ox)2(OxH)2(NCS)2] with solvent Water in Binary Aqueous Mixtures
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Oh Sang-Oh
Seok Huee-Young
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Abstract
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The rates of oxygen ring formation of [Mo2O3(Ox)2(OxH)2(NCS)2] have been investigated spectrophotometric method in binary aqueous mixtures. Temperature was 20℃ to 40℃ and pressure was varied up to 1500 bar. The observed rate constants are increased by hydrogen ion and decreased by thiocyanate. The more increasing of co-solvents dielectric constant, the more stable intermediate is formed. The observed rate constant is given by, kobs-1 = k-1 (1 + K-1[H2O]-1) All activation parameters are positive values. The oxygen ring formation of [Mo2O3(Ox)2(OxH)2(NCS)2] is believed to be a interchange-dissociative mechanism.
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