Kinetics and Mechanism of the Reaction of Aquaoxomolybdenum(Ⅴ) Dimer with Thiocyanate 


Vol. 31,  No. 4, pp. 344-351, Aug.  1987


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  Abstract

[Mo2O4(H2O)6]2+와 티오시안산과의 착물생성에 대한 속도론적 연구는 분광광도법으로 수행하였다. 이 반응의 관찰된 속도상수 kobsd는 다음과 같이 주어진다.kobsd = {ko + kH[H+]} [SCN-]2 + kr. 이온세기가 2.84이고 온도가 25℃일때 kf와 kr의 값은 각각 5.96 ± 0.35 M-2s-1 과 (5.45 ± 4.77) × 10-4s-1이다. 20°∼ 35℃일 때 활성화파라미터는 ΔH* = 38.04 ± 5.31kJmol-1 이고 ΔS* = -172.69JK-1mol-1 이다. 이들 반응의 메카니즘에 대하여 논의 된다. Kinetic studies on the complexing of [Mo2O4(H2O)6]2+ with thiocyanate have been carried out using the spectrophotometric method. The observed rate constant is given by, kobsd = {ko + kH[H+]} [SCN-]2 + kr. At 25℃ and ionic strength of 2.84 the values of kf and kr are 5.96 ± 0.35 M-2s-1 and (5.45 ± 4.77) × 10-4s-1, respectively. Activation parameters from data at 20°∼ 35℃ are ΔH* = 38.04 ± 5.31kJmol-1 and ΔS* = -172.69JK-1mol-1. The mechanisms are discussed.

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  Cite this article

[IEEE Style]

C. Kim and J. Lee, "Kinetics and Mechanism of the Reaction of Aquaoxomolybdenum(Ⅴ) Dimer with Thiocyanate," Journal of the Korean Chemical Society, vol. 31, no. 4, pp. 344-351, 1987. DOI: .

[ACM Style]

Chang-Su Kim and Joong-Ho Lee. 1987. Kinetics and Mechanism of the Reaction of Aquaoxomolybdenum(Ⅴ) Dimer with Thiocyanate. Journal of the Korean Chemical Society, 31, 4, (1987), 344-351. DOI: .

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