Journal of the Chemical Society, Dalton Transactions p. 1825 - 1828 (1982)
Update date:2022-09-26
Rotondo, Enrico
Priolo, Francesca Cusmano
Under suitable experimental conditions the reaction of the salicylaldehydato-ion (sal) with diethylenetriamine (dien) in the presence of copper(II) takes place trough a first-order kinetic process.The reactants are envisaged as being first co-ordinated to the copper(II), forming a labile ternary complex; interligand condensation is then supposed to occur within the co-ordination sphere of the metal.In the resulting reaction sequence the metal ion functions as a rudimentary enzyme.The dramatic difference between the activity if an ideal enzyme system, which reduces the order of a reaction by one unit through the rapid formation of ternarycomplex, and that of the copper(II) ion, which through an analogous mechanism promotes the reaction of sal and dien, is interpreted on the basis of a perturbation from the optimum reaction geometry of the reactants by the co-ordination of the functional groups to the metal.
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