Novel tribochemically active metal chelates of aromatic azo ligands

Novel Cu(II) and Pd(II) complexes with o-phenylaminoazo compounds were synthesized and studied by X-ray diffraction. Distorted tetrahedral chelate complex of Cu contains two six-membered CuN₃C₂ metal cycles. The complexes under study can be used as industrial lubricant additives.     

Tribochemically active chelate complexes of salicylideneimines

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 ¹H 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.     

Tribologically active azomethine metal complexes

Russian Journal of General Chemistry - Oil-soluble bis(salicylideneiminates) were prepared chemically (from acetates of 3d-metals) and electrochemically (by anodic dissolution of complex forming...     

Electrochemical synthesis,structure, magnetic and tribochemical properties of metallochelates of new azomethine ligands,bis-[2-(<Emphasis Type="Italic">N</Emphasis>-tosylaminobenzylidenealkyl(aryl)]disulfides

On the basis of new ligand systems, bis-azomethines of N-tosylaminobenzaldehyde and alkyl(aryl) diaminodisulfides, mono- and binuclear chelates with 4N- and 2N2S-ligand arrangement were chemically (from metal acetates) or electrochemically (from metals in the zero oxidation state) first synthesized and characterized. Mononuclear chelates have a tetrahedral structure. In binuclear copper complexes the magnetic exchange interaction of the antiferromagnetic type was observed. Bisazomethines of disulfides were used as additives to lubricant oils.