Mechanistic Studies of the Hydrolysis of Pyrophosphate Promoted by Tetraaminecobalt(III) Ions
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Date
1990-06
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Addis Ababa Universty
Abstract
The hydrolysis of pyrophosphate was investigated at different
concentrations (2X10~3 M, 4X10~3 M and 1(f2 M) of [N4CO(OH)(OH ))2+
[N. = en2 and tn^ ten = ethylenddiamine, tn = trimathylenediamine)]
2+ + ' - using Eu /H and OH quenching techniques. The reaction was
inonitored by measurement of orthophosphate (pi) in quenched aliquots
of the reaction mixtures using Malachite Green phosphornolybdate
complex as the analytical reagent. The reactive species with regard
III to hydrolysis was found to be a 3:1 N^Co ppi complex. The results
show a relatively larger amounts of degradation products for the
directly added systems than for those mixed by step wise addition.
Factors affecting the formation and degradation of the reactive
species are discussed and plausible mechanisms are forwarded
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Keywords
Tetraaminecobalt(III) Ions