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Interaction of cyanocobalamin with sulfur-containing reducing agents in aqueous solutions
Authors:D. S. Salnikov  I. A. Dereven’kov  E. N. Artyushina  S. V. Makarov
Affiliation:1. Ivanovo State University of Chemistry and Technology, Ivanovo, 153000, Russia
Abstract:The kinetics and mechanism of cyanocobalamin reduction by sodium hydroxymethanesulfinate and dithionite in alkaline media are studied. It is established that the character of the rate-determining step depends on the concentration of the reducing agents: when they are in excess, it is a step of elimination of cyanocobalamin, at lower concentrations of reducing agents a rate-determining is a step of their addition to cobalamin.
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