METAL TEMPLATE SYNTHESIS OF LANTHANIDE CRYPTATES - CRYSTAL-STRUCTURE OF A DYSPROSIUM CRYPTATE

Lanthanide(III) and yttrium(III) ions have been shown to behave as eff icient metal templates in the synthesis of cryptates [M(2)L][NO3](6) . xH(2)O . ysolv (M = Y, La, Ce, Pr, Nd, Eu, Gd, Tb, Dy, Ho, Er, Tm or Yb) derived from the 2+3 condensation of tris(2-aminoethyl)amine with 2,6-diformyl-4-methyIphenol. The complexes have been characterised by elemental analysis, molar conductivity, mass and IR spectroscopy and t he yttrium complex was also characterised by NMR spectroscopy. The cry stal structure of the dysprosium complex was determined.