4,4'-Bipyridine complexes with some uranyl salts

Abstract

The complexes formed by 4,4?-bipyridine with uranyl chloride, sulphate, and nitrate of the type UO₂(4,4?-bipyridine)X₂, where X = Cl or ^1/2SO₄, and UO₂(4,4?-bi-pyridine)_1.5(NO₃)₂ have been prepared and their infrared spectra in the rock salt and low-frequency region (down to 200 cm^-1) studied in the solid state. I.r. spectra of these complexes show that 4,4?-bipyridine acts as a bidentate ligand bridging between two metal atoms. It is suggested that the sulphate and nitrate groups act as bidentate chelating ligands and the complexes are polymeric structures.