The synthesis and characterization of a novel vic-dioxime and its mononuclear complexes bearing an 18-membered N2O2S2 macrocycle and their characteristics as extractants for transition metal ions

The Synthesis and Characterization of a Novel v/c-Dioxime and Its Mononuclear Complexes Bearing an 18-Membered N202S2 Macrocycle and Their Characteristics As Extractants for Transition Metal Ions A new (E, E)-dioxime (H2L) containing a diazadioxadithia macrocyclic moieties has been synthesized by reaction of an aromatic primary amine with cyano-gendi-N-dioxide. The BF2 -capped Ni mononuclear complex of this new oxime has been synthesized using a precursor hydrogen-bridged mononuclear Ni2+ complex. The solvent extraction of transition metal cations by (3) and (6) with picrate anion into chloroform has been studied at 25 °C and UV- visible spectroscopy. The extractability and selectivity of transition metal picrates, (Pb2+, Ni2+, Co2+, Cd2+, Zn2+, Cu2+, Ag4) has been evaluated. The structures of new compounds are identified by using elemen-tal analysis, *H and 13C-NMR, IR and MS spectral data.Key words: v/c-Dioxime, Template Effect, Mononuclear Komplex, BF2+-Capped Com plex, Mixed-Donors, Extraction. -