A general comparison of the solvent extraction properties of some bidentate organophosphorus compounds with the structure 0 0
C6Hl3 P-(CH2)n -P (n-1, 2, 3, 4) C6Hl3 C6Hl3 is reported. The partition of mineral acids and the solvent extraction of uraniurn(VI), praseodymium, neodymium, samarium and thulium from nitrate, chloride and perchlorate media are considered. The cornplexing (in solution) of uraniurn(VI) nitrate by these bidentate ligands and tri-n-octyl phosphine oxide (TOPO) was investigated by means of infrared - spectral data, partition studies and molar conductivity and viscosity measurements. Chemical analyses and nuclear magnetic resonance proton spectral data for water-saturated solutions of these organophosphorus compounds in an inert diluent are presented
