1986 Volume 59 Issue 2 Pages 613-616
The kinetics of formation of bis(oxalato)oxovanadate(IV) [VO(ox)2(H2O)]2− (hereafter water molecule will be omitted) from the reaction of bis(glycinato)oxovanadium(IV) [VO(gly)2] with oxalate has been studied by the stopped-flow method. The reaction was found to consist of two consecutive steps, a relatively slow step (k1) and a fast one (k2). The values of rate constants k1 and k2 were independent of the concentration of free oxalate and of the pH of solution ranging from 4.2 to 6.5. Similar behavior was also observed in the acid decomposition of [VO(gly)2]. A mechanism passing through an intermediate, [VO(ox)(gly)]−, was proposed.
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