SCHIFF-BASE DERIVATIVES OF LANTHANONS - SYNTHESIS OF LA(III), PR(III) AND ND(III) DERIVATIVES OF BETA-KETOIMINES DERIVED FROM 2,4-PENTANEDIONE

Reactions of the isopropoxides of some of the lighter lanthanons with bidentate β-ketoimines, such as AAH-n-C4H9 and AAH-C6H5 (donor system: N,OH) and tridentate β-ketoimines such as AA(CH2CH2)H2 and AA(CH2CHCH3)H2 (donor system: HO,N.OH) have led to products of the types Ln(O-i-C3H7)3 n (AA-R)n, Ln(O i-C3H7) (AAR') and Ln2(AAR')3 [Ln=La(III), Pr(III) or Nd(III);n=1 or 2;R=-n-C4H9 or-C6H5 and R'=-CH2CH2-or-CH2CHCH3-]. Some undergo exchange reactions with an excess of tert-butanol, leading to the corresponding complexes Ln(O-tert-C4H9)3 n (AA-n-C4H9)n and Ln(O-tert-C4H9) (AA-CH2CH2). All these have been characterised by elemental analysis, molecular weight determinations and their ir spectra. A thermogravimetric analysis of the diisopropoxy derivatives has also been carried out. © 1979 Springer-Verlag.