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Abstract
The reactions of lanthanide isopropoxides (Pr, Nd, Sm, Dy and Ho) with acetoacetanilide semicarbazone (Ac.An. Semi H2) and acetoacetanilide thiosemicarbazone (Ac.An. Thiosemi H2) and 1:1 and 2:3 molar ratios in refluxing benzene yielded products of the type: Ln(OPri) (Ac. An. Semi), Ln2(Ac.An. Semi)3, In(OPri) (Ac. An. thiosemi) and Ln2(Ac. An. thiosemi)3 (where Ac. An. Semi and Ac. An. Thiosemi are deprotonated semicarbazone and thiosemicarbazones and Ln = Pr, Nd, Sn, Dy and Ho). All these complexes are microcrystalline solids with a colour characteristic of the trivalent state of the corresponding lanthanide ion and are insoluble in common organic solvents. The compounds were characterized by means of chemical analyses and infrared spectral data.