Oxidation of malononitrile complex of pentaammineruthenium(II)

• Published in: Inorganica Chimica Acta Vol. 358; no. 4; pp. 885 - 890
• Main Authors: Huang, Sunny, Lin, Ingrid, Wang, Sabina, Yeh, Joyce, Yeh, Andrew
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2005
• Subjects: Kinetics and mechanism; Malononitrile complex; Nitrile hydrolysis; Kinetics and mechanism; Nitrile hydrolysis; Malononitrile complex
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/j.ica.2004.10.001

The oxidation of Ru(NH 3) 5NCCH 2CN 2+ complex by the peroxydisulfate ion in the aqueous solution yields two products, Ru(NH 3) 5NHCOCH 2CN 2+ with λ max = 373 nm and ▪ with λ max = 863 nm. The distribution of the products depends on the acidity of the solution with the formation of the binuclear complex favored at lower acid concentrations. A mechanism for the oxidation has been proposed by the kinetic studies in the region of 0.001–0.10 M acid concentrations. The oxidation of Ru(NH 3) 5NCCH 2CN 2+ complex by the peroxydisulfate ion in the aqueous solution yields two products, Ru(NH 3) 5NHCOCH 2CN 2+ with λ max = 373 nm and ▪ with λ max = 863 nm. The distribution of the products and the amount of oxidant required for the maximum yield of the binuclear complex depend on the acidity of the solution. The production of the binuclear complex was favored at lower acid concentrations. The formation of C C bond in the binuclear complex was characterized by both the spectral and the electrochemical results. A mechanism for the oxidation has been proposed by the kinetic studies in the region of 0.001–0.10 M acid concentrations.