Tribochemically active chelate complexes of salicylideneimines
摘要:
N-Alkylsalicylideneimines and their complexes with 3d metals were obtained by chemical (from metal salts) and electrochemical methods (from metals in the zero oxidation state). The compounds obtained were characterized by IR and H-1 NMR spectroscopy and X-ray diffraction analysis. According to crystallographic data, nickel bis(chelate) exists in the trans-planar configuration. A friction test revealed that the tribotechnical characteristics of lubricating formulations are substantially enhanced in the presence of N-alkylsalicylideneiminates.
Mechanism of formation of Schiff base complexes. Part 3. Kinetic template effect of copper(II) in the condensation reaction of the salicylaldehydato-ion with a polyfunctional diprimary amine
作者:Enrico Rotondo、Francesca Cusmano Priolo
DOI:10.1039/dt9820001825
日期:——
conditions the reaction of the salicyaldehydato-ion (sal) with diethylenetriamine (dien) in the presence of copper(II) takes place through 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