The dynamic NMR investigation of Zn, Mg, Ph and Hg binuclear complexes with TTHA (triethylene-tetraaminhexaacetic acid) is reported in this paper. The intramolecular rearrangement of Zn(2)TTHA is observed in the range of the temperature studied and the rate constants of the rearrangement process are calculated by the simulating ta the experimental spectra. It is suggested that the structural units of Zn(2)TTHA are two octahedral units but not two tetrahedral ones; the activation energies E(a) of the binuclear complexes of Mg, Pb and Hg with TTHA are estimated by the Bloch equation of the two sites exchange; and the order of E(a) is linearly related to the ion potential of the metal ions.
(8.0+极速模式)