The complexes of metals(Mg,Ca,Sr,Ba,La,Y and Lu)with ethylenediamine-N,N′-diacetate-N, N′-di-β-propionate have been studied by proton nuclear magnetic resonance(PMR).The interesting quartet spectral pattern of acet...The complexes of metals(Mg,Ca,Sr,Ba,La,Y and Lu)with ethylenediamine-N,N′-diacetate-N, N′-di-β-propionate have been studied by proton nuclear magnetic resonance(PMR).The interesting quartet spectral pattern of acetate protons and multiplet spectral pattern of protons of propionate groups for the complexes of metal ions of high charge density have been observed.The results show that the chemical bond for these complexes is predominantly ionic and the lability of metal-nitrogen bond as well as metal- oxygen bond decreases with increasing charge density of cations.展开更多
文摘The complexes of metals(Mg,Ca,Sr,Ba,La,Y and Lu)with ethylenediamine-N,N′-diacetate-N, N′-di-β-propionate have been studied by proton nuclear magnetic resonance(PMR).The interesting quartet spectral pattern of acetate protons and multiplet spectral pattern of protons of propionate groups for the complexes of metal ions of high charge density have been observed.The results show that the chemical bond for these complexes is predominantly ionic and the lability of metal-nitrogen bond as well as metal- oxygen bond decreases with increasing charge density of cations.
