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- W2029337567 abstract "The interactions between NiII cations and bidentate Schiff base ligands, N-alkyl-5-X-salicylaldimine HL (X = H; R = Et, nPr, tBu; X = Cl, OMe, NO2; R = nPr), and bis(N-n-alkyl-5-X-salicylaldiminato)nickel(II) complexes [NiL2] (X = H; R = Et, nPr, nBu; X = Cl, OMe, Me; R = nPr) were investigated by UV/Vis spectrophotometry in acetonitrile. The kinetics for the formation of NiII/HL 1:1 adducts was studied by stopped-flow techniques, which showed that the process followed a two-consecutive mechanism. Experimental evidence and theoretical calculations indicated the formation of an unidentate intermediate in the first step, according to a dissociative interchange mechanism. Ring-closure occurs in the second step and its rate is slower for electron-withdrawing-substituted Schiff bases. Nickel(II) cations interact with [NiL2] affording [NiL]+ and [Ni2L3]+ species; the associated equilibrium constants were found to be related to the electronic effects of the 5-X ligand substituents. (© Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)" @default.
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- W2029337567 date "2002-07-01" @default.
- W2029337567 modified "2023-09-24" @default.
- W2029337567 title "Kinetics and Equilibria of Nickel(II)−Schiff Base Adducts Formation" @default.
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- W2029337567 doi "https://doi.org/10.1002/1099-0682(200207)2002:7<1703::aid-ejic1703>3.0.co;2-n" @default.
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