Chem. J. Chinese Universities ›› 1991, Vol. 12 ›› Issue (4): 444.

• Articles • Previous Articles     Next Articles

Synthesis and Characterization of 5,12-Diphenyl-7,14-Dimethyl-1,4,8,11-Tetraazamacrocyclotetradecane-N,N"-Diacetic Acid and Its Lanthanide Complexes

Chen Li-qin, Xu Ji-de, Ni Shi-sheng   

  1. Department of Chemistry, Anhui University, Hefei, 230039
  • Received:1989-10-28 Online:1991-04-24 Published:1991-04-24

Abstract: Asimple stereospecific synthesis of c-meso-meso-5, 12-diphenyl-7,14-dimethyl- 1,4,8,11-tetraazamacrocycloteradecane-N,N"-4iacetic acid(H2L3) is reported. The 14 lanthanide (La through Lu, Pm excluded) complexes with this ligand have been prepared in methanol solutions by the interaction of H2L3with the rare earth chlorides. All these complexes in microcrystalline powder have constant stoichiometry, Ln(H2L3)CIs·nH2O, irrespective of the metal to ligand ratio used in the preparation. These compounds are characterized by elemental analysis, thermoanalysis, conductivity measurements and IRspectra.

Key words: Tetraazamacrocyclotetradecane, N-acetic acid, Rare earth elements, Complex

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