โ Scribed by Donald E. Leyden; Jerry F. Whidby
No coin nor oath required. For personal study only.
Metal chelates of ethylcnediarnir~etctr;racetic acid (EDTA) have rcccived much attention and the stability constants for the formation of il large number of metal-EDTA cldatcs llave been tabulated in numerous publications. In most of these che-Jates, the principal species present in a(1ueous solution is the one wit11 an x : I: metal-EDTA ratio, but some exceptions such as molybclenut~~ do exist'. However, the similarity of structure between the two iminodiacetate groups of 15DTA and iminodincctic acid suggests the possibility of a less stable species containing two metal ions, each chcIatcd by an iminodiacetate group. Such structures have been sufi-gcstcd2 as intermediates in elcctr~)pl~ilic substit~ltion (SN) ligand-exchange reactions Unsymtnetrical SIC (Mt#Mt,) reactions involving EDTA have been studied using spectrophotomctric methods" and polarographic techniques"-@. Symmetrical .!'!'I.:
(If r, =MI,) reactions have been investigated using radiochemical methods3 and nuclear magnetic resonance techniques2.
* Prescntcd in part ot the Southeastern Rc&onal hfcetin~ of the American Chemical Society, +tlanta. Geor&a in November, x967.
๐ SIMILAR VOLUMES