Complexes of uranium tetrachloride and thorium tetrachloride with N-methylpiperazine, 2-methylpiperazine, N-phenylpiperazine, N,N′-dimethylpiperazine and pyrazine

Abstract

Stable complexes of uranium tetrachloride and thorium tetrachloride with the title ligands have been synthesised and characterised on the basis of elemental analyses, IR and electronic reflectance spectral studies and magnetic susceptibility measurements. The ligands probably coordinate in the chair conformation bridging the metal ions as indicated by IR spectral studies and insolubility of these complexes in common organic solvents. A coordination number of six for uranium (IV) is suggested by the electronic reflectance spectral and magnetic susceptibility data.