Organocobalt complexes containing axial haloalkyl groups afford metallacycles of different size by N or O alkylation of the macrocyclic equatorial ligands. The reaction mechanism involves the intramolecular nucleophilic attack of a negatively charged atom of the equatorial ligand on the axial 2 XCH haloalkyl group with simultaneous detachment of a halide ion, X. In imino/oxime and amino/oxime d...

Attaching dialkylaminomethyl arms to commercial phenolic oxime copper extractants yields reagents which transport base metal salts very efficiently by forming neutral 1:1 or 1:2 complexes with zwitterionic forms of the ligands.

In present paper the equilibrium of cobalt extraction with 1-(2-pyridyl)tridecan-1-one oxime from the chloride/sulphate solutions was studied. The presented results indicated that extraction depends on a number of process variables, including the pH, metal and Cl- concentration in the aqueous feed, and concentration of the oxime in the organic phase. The created cobalt-complexes with the 2-pyri...

The simplest derivative of 2-(hydroxyimino)carboxylic acids, glyoxilic acid oxime (gaoH2), was used as a model compound for investigation of the metal-ligand interactions in a series of metal complexes: Cu(gaoH)2(H2O)2, Zn(gaoH)2(H2O)2, Co(gaoH)2(H2O)2, Ni(gaoH)2(H2O)2, [Cd(gaoH)2(H2O)2]H2O, K[Pd(gao)(gaoH)] and K[Pt(gao)(gaoH)]3/4H2O. The coordination abilities of the active ligand forms, gaoH...

We report the O-alkylation of oximes with Michael acceptors using Cs2CO3 as catalyst. The transformation proceeds stereospecifically retention oxime configuration. Irradiation visible light in presence diphenyl anthracene and cerium complexes affects E to Z configuration ratio ether products, but a complete stereocontrol was not achieved. operationally simple protocol allows synthesis various O...

Oxime extractants 3-tert-butyl-2-hydroxy-5-methyl benzaldehyde oxime (HL1) and 3-tert-butyl-2-hydroxy-5-methoxy benzaldehyde oxime (HL2) were synthesized and characterized by conventional spectroscopic methods. Suitable lipophilic nature of the prepared extractants allowed examining the ability of these molecules for extr...