Synthesis and characterization of rare earth nitrates ternary complexes with glycine and 1,10-phenanthroline

Eight new complexes with the general formula of RE(Gly)(NO3)(3)(phen)(2)(center dot)3H(2)O (RE = La, Ce, Pr, Nd, Gd, Sin, Er, Y) were synthesized and characterized by elemental analysis, molar conductivity, IR spectra, UV spectra and thermal analysis. All the complexes are stable in air and their conductance values in acetonitrile lie in the range of 204. 1 similar to 239.4 S(center dot)cm(2 center dot)mol(-1), indicating 1:2 type electrolytes. The IR shows that all the COO of glycine and oxygen atom of NO3- take part in the coordination to the RE ions. The thermal behavior of La complex shows that the weight losses at 75 similar to 120 degrees C and 145 similar to 170 degrees C correspond to the loss of two lattice water molecules and one coordinated water molecules, respectively.