Synthesis, solution and electrochemical behaviour of new aza-crown ethers derived from biphenyl

Macrocyclic ligands L-1-L-4 containing biphenyl units have been synthesized . Potentiometric and voltametric studies in the presence and the absence of transition metal cations have been carried out. The relationship between t he conformation of the ligand and oxidation states has been also considered . The crystal structure of [HgL2(CN)(2)]. 2Hg(CN)(2) has been elucidated by X-ray diffraction techniques.