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KMID : 1059519860300030307
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Journal of the Korean Chemical Society
1986 Volume.30 No. 3 p.307 ~ p.311
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Kinetics of Acid Hydrolysis of trans-Fluoroaquobis(ethylenediamine) Chromate(III) Cation
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Oh Sang-Oh
Lee Sang-Hyup
Lim Jong-Wan
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Abstract
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The rates of hydrolysis of the complex, trans-[Cr(en)2F(H2O)]2+, have been investigated using spectrophotometric method at various temperatures and pressure. Temperature was 30℃ to 50℃ and pressure was varied up to 1500bar. The rate constant measured at 30℃ is 2.632 × 10-5sec-1. The rate constants are decrease with increasing pressure at constants temperature. Activation volume and other activation parameters are calculated from these rate constants. The activation volumes are all positive and lie in the limited range 0.447 ∼ 3.152cm3/mol and the activation entropies are small values. From the results, it was found that this reaction was endothermic and enthalphy controlled reaction in the experimental temperature.
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