IR-SPECTRA OF THORIUM(IV) COMPLEXES WITH 2-R-BENZENECARBOXYLIC ACIDS

A detailed interpretation of the IR spectra of thorium(IV) complexes with 2-R-benzenecarboxylic acids with general formulae: Th(OH)2(2-R-C6H4COO)2.nH2O(R=-H, n=1; R=-OH, n=4; R=-NH2, n=4) and Th(2-R-C6H4COO)4 (R=-H, -Cl, -NO2, -CH3) have been given. The conditions of preparation of the following thorium(IV) complexes Th(2-ClC6H4COO)4,Th(2-CH3C6H4COO)4 and Th(2-NO2C6H4COO)4 have been described. The influence of thorium(IV) cation on the aromatic system of ligands and on the way of coordination of this cation with the 2-R-benzenecarboxylate group was considered.