MAGNETIC-SUSCEPTIBILITIES OF LANTHANIDE(III) CMPO COMPLEXES AND LANTHANIDE(III) OXALATE COMPLEXES

Lanthanide(III)-CMPO complexes with nitrate ion as counter-ion and lanthanide(III)-oxalate complexes were synthesized. The former complexes were identified as Ln(NO3)3.3CMPO for La(III), Ce(III), Pr(III) and Nd(III), whereas Ln(NO3)3.2CMPO were formed for Sm(III), Eu(III) and Gd(III). The latter were identified as Ln2(C2O4)3.9H2O for complexes of La(III) and Ce(III), and as Ln2(C2O4)3.10H2O for Pr(III), Nd(III), Sm(III), Eu(III) and Gd(III). From the dependence of magnetic susceptibility on temperature in the range from room temperature to liquid nitrogen, the effective numbers of the Bohr magneton were estimated as 1.9, 2.9, 2.8 and 7.9 for Ln(III)-CMPO complexes and 1.9, 3.2, 2.6 and 8.3 for Ln(III)-oxalate complexes, (Ln:Ce, Pr, Nd and Gd) respectively.