Vibrational spectra of uranyl monosulfite complexes with neutral ligands

Infrared and Raman-spectra (30-4000 cm-1) of the UO2SO3xnLxmH2O complexes where L is acetamide, dimethylformamide, urea, dimethylurea, tetramethylurea or antipyrin, n is 0.1, 1.5 or 2, m is 0, 0.5, 1, 1.5, or 4.5 have been studied. It is shown that depending on L nature the sulphite group is coordinated in a bidentate way or forms bridges of various types. The effect of a neutral ligand on the force constant Ksub(uo) and on the state of bonds in the uranyl-ion in the complexes depends on the nature of the coordinated acidoligand. The force constants have close values for those uranyl compounds in which the type of sulphite group coordination is approximately the same. The values of Ksub(uo) change is in accordance with character of the change of the frequencies ν1(SO) and ν3(SO) in uranyl suphitocomplexes as compared to suphite ion