| Abstract: | Lanthanide p-toluene sulphonic acid (ptsa) complexes were prepared for La, Pr, Nd, Sm, Eu, Dy, Ho, Er and Yb, and found to exist as Ln(ptsa)3. Conductivity studies of La(ptsa)3 in DMSO and DMF suggest 1:2 and, possibly, 1:1 electrolyte behaviour in these solvents, respectively. NMR lanthanide-induced chemical shifts (LIS) for aromatic protons in (ptsa)? and methyl protons in DMSO, were measured for all complexes as a function of the Ln3+DMSO] in a medium consisting of CCl4, DMSO, and CH3CN. Analysis of the LIS data suggests a change in (ptsa)? coordination round Ln3+ across the lanthanide series. |
