N-substituted ethylcarbamate adducts of thoriumm tetrachloride, uranium tetrachloride and uranyl nitrate

Abstract

Thorium tetrachloride forms 1:3 complexes with N,N-dimethylethylcarbamate (DMU) and with N-methylethylcarbamate (MU), whereas uranium tetrachloride forms complexes of formula UCl 4·2DMU and UCl 4·2MU·THF (where THF = tetrahydrofuran) respectively. Urnyl nitrate forms 1:2 complexes with either DMU or MU. The IR spectra show that in all the adducts both the ligands coordinate the metal through the carbonyl oxygen atom. The uranyl complexes exhibit their most usual six-coordination around the central monodentate molecules of the organic ligand. In the uranium and thorium tetrachloride adducts with MU the chlorine atoms seem to act as hydrogen bond acceptors with respect to the NH groups of the ligand. 1 H nmr spectra are reported and discussed.