Synthesis And Structural Characterization Of Transition Metal Complexes Bearing Diazaphospholide Ligands

Five-membered diazaphospholide compounds were a kind of unique aromatic heterocyclic ligands with lone pair electrons, n electronics, aromaticity, and low coordination of phosphorus. In this paper, several new diazaphospholide compounds were synthesized and their structures and properties were characterized and studied.1. A9-boron bicycle-(3,3,1)nonane-2-diazaphospholide potassium (1) was prepared by the reaction of9-boron bicycle-(3,3,1)nonane and1H-1,2,4diazaphosphole. The compound had been characterized by X-ray single crystal diffraction, NMR, and IR.2. Two9-boronbicycle-(3,3,1)nonane-2-diazaphospholide cobalt (2) and nickel (3) complexes were prepared by the reaction of1and CoCI2and NiBr2, respectively. These compounds (2and3) had been paramagnetism confirmed by EPR as well as SQUID measurment. The compounds had been also characterized by X-ray single crystal diffraction, NMR, and IR.3. A novel tetrameric ruthnium diazaphopsholide complex (4) was prepared by the reaction of tert-butyl diazaphospholide potassium with methylisopropyl bromide ruthenium, which had been characteized by X-ray single crystal diffraction, NMR, and IR.