Reactions of tetrachlorodioxouranate(VI) ion with neutral and protic ligands

Summary The reactions of bipyH₂]UO₂Cl₄]·3H₂O (bipyH₂=diprotonated 2,2-bipyridyl) with a series of neutral and protic oxygen donor ligands have been investigated. N,N-dimethyl formamide (DMF), N,N-dimethyl acetamide (DMA) and dimethyl sulphoxide (DMSO) gave compounds of the type bipyH₂]UO₂Cl₄(L)₂] (L=DMF or DMA) and bipyH₂]UO₂Cl₄(DMSO)_n] (DMSO)_3-n (n=1 or 2), while bipyH₂]UO₂Cl₄-(3PNO)(DMSO)_n](DMSO)_2-n (n=1 or 2) and bipyH]UO₂Cl₃(4PNO)(DMSO)] were obtained with 3-picoline N-oxide (3PNO) and 4-picoline N-oxide (4PNO) respectively from DMSO medium. With excess 2-picoline N-oxide (2PNO) the compound bipyH]UO₂Cl₃(2PNO)](DMSO) was obtained. Reaction with acetyl acetone (AcAcH) and 8-hydroxy quinoline (QH) in 1:1 mole ratio in DMSO gave compounds of the type bipyH₂]UO₂Cl₃(L)(DMSO)] (L=AcAc or Q). The compounds have been investigated by i.r. spectra, powder x-ray diffraction and molar conductivity measurements.