Effects of aminocarboxylate ligands of surface active copper(II) complexeson the hydrolysis of p-nitrophenyldiphenylphosphate

The rate of hydrolysis of p-nitrophenyldiphenylphosphate in the presence of micellized [Cu(C(12)tmed)(L)](+) where C(12)tmed is N,N,N'-trimethyl-N'-do decylethylenediamine and L is the anion part of the amino acid has been inv estigated. It was found that the observed maximum rate obtained under the e xcess surfactant over the substrate condition depends very much on the abil ity of the amino acid ligand to form a mixed-chelate complex with the [Cu(C (12)tmed)](2+) moiety. In general, a chelating ligand with better coordinat ion ability gives a slower rate because of the reduction in the supply of C u-OH nucleophile in the micelle, (C) 1999 Academic Press.