Studies on complex compounds of thorium(IV) with pyridine and quinoline carboxylic acid. Part I

Abstract

Thorium acetylacetonate [Th(acac)4] reacts with pyridine carboxylic acids in acetone giving eight coordinate thorum(IV) complexes of the compositions [Th(pic)4] and [Th(picO)4] (picH = picolinic acid, picOH = picolinic acidN-oxide). The complex [Th(dip)2] · 3H2O (dipH2 = pyridine-2,6-dicarboxylic acid) is also reported. Thorium(IV) complexes of the types [Th(quin)2] · 2H2O and [Th(quind)2(acac)2] (quinH2 = quinolinic acid or pyridine-2,3-dicarboxylic acid, quindH = quinaldinic acid) were prepared by the interaction of [Th(acac)4] with the respective acids in acetone. The lower solubility and i.r. spectral studies of the complex [Th(quin)2] · 2 H2O suggest that it is polymeric.