Template Synthesis of Binuclear Lanthanoid Complexes with Macrocyclic Schiff Base Constituted of 2,6-Diacetylpyridine and 1,3-Diamino-2-propanol

Reaction of 2,6-diacetylpyridine with 1,3-diamino-2-propanol in the presence of lanthanoid(III) ions gave complexes of (2+2) macrocyclic tetraimine ligand, H2apdapy. Complexes synthesized have the composition of Ln2(apdapy)(NO3)4(H2O)5 (Ln=La or Pr) or Ln2(apdapy) (NCS)4 (H2O)4 (Ln=La, Pr, Nd, Sm, or Eu). It is suggested that the complexes are considerably stable and maintain the binuclear structure in dimethylsulfoxide solution.