Coordination Compounds of Rare Earth Cyanoacetates

Abstract

Coordination compounds of rare earth cyanoacetates, [Ln(NCCH₂COO)₃L-L], where Ln = La, Pr, Nd, Eu, Gd, Tb, Dy, Yb, Lu or Y and L-L=2,2'-bipyridyl (Bipy) or 1,10 phenanthroline (Phen), have been synthesised and characterised by elemental analysis, infrared spectroscopy (4000-200 cm^-1), thermogravimetric analysis, molar conductance measurements and X-ray diffraction powder patterns. Comparative donor behaviour of Bipy and Phen towards lanthanide cyanoacetates in terms of the thermal stabilities of the complexes and the polarizing power (e/r²) of Ln³⁺ ion has been discussed.