SYNTHESIS AND CHARACTERIZATION OF BIS(BETA-DIKETONATO)NITRIDOTECHNETIUM(V) COMPLEXES

The synthesis of bis(beta-diketonato)nitridotechnetium(V) complexes by a single-step ligand-substitution reaction has been reported for the first time by the reaction of TcNCl2(PPh(3))(3) with the deprotonated beta-diketonate ligands (acetylacetonate, acac(-); benzoylacetonate, b za(-); dibenzoylmethanate, dbm(-); dipivaloylmethanate, dpm(-)) in dic hloromethane/methanol (3:1) solution. The complexes were purified by s olvent extraction and column chromatography, identified by elemental a nalyses, and characterized by uv/vis/ir spectrophotometry and paper el ectrophoresis. Chromatographic behavior of the complexes shows that th e lipophilicity order is TcN(dpm)(2) > TcN(dbm)(2) > TcN(bza)(2) > TcN (acac)(2).