Nonenzymatic NADH-Dependent Reduction of Keggin-Type 12-Tungstocobaltate(III) in Aqueous Medium | Zendy

Prabla Kumari | Zendy; Alaka Das | Zendy; Dillip Kumar Baral | Zendy; A. K. Pattanaik | Zendy; Pradeep Kumar Mohanty | Zendy

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Nonenzymatic NADH-Dependent Reduction of Keggin-Type 12-Tungstocobaltate(III) in Aqueous Medium

Author(s) -

Prabla Kumari,

Alaka Das,

Dillip Kumar Baral,

A. K. Pattanaik,

Pradeep Kumar Mohanty

Publication year - 2010

Publication title -

journal of chemistry

Language(s) - English

Resource type - Journals

eISSN - 2090-9063

pISSN - 2090-9071

DOI - 10.1155/2011/341865

Subject(s) - electron transfer , chemistry , nad+ kinase , aqueous solution , kinetics , aqueous medium , redox , inorganic chemistry , organic chemistry , enzyme , physics , quantum mechanics

The kinetics of the electron transfer reaction of NADH with 12-tungstocobaltate(III) has been studied over the range 5.07 ≤ 104 [NADH] ≤ 15.22 mol dm-3, 7.0 ≤ pH ≤ 8.0 and 20 ≤ t ≤ 35 oC in aqueous medium. The electron transfer reaction showed first-order dependence each in [NADH]T and [12-tungstocobaltate(III)]T. The products of the reaction were found to be NAD+ and 12-tungstocobaltate(II). The activation parameters ΔH# (kJ mol-1) and ΔS# (JK-1mol-1) of the electron transfer reactions were found to be 64.4±1.8 and -48.86±6.0. Negative value of ΔS# is an indicative of an ordered transition state for the electron transfer reaction

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