Inorganic Chemistry, Vol. 10, No. 5, 1971 947
AN ASSOCIATED ETHYLENEDIAMINE LIGAND
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PH Figure 1.-Variation with pH of the concentrations (given as the percentage of the total Cu2+present) of the several species present in an aqueous solution of Cu2+, 2-picolylamine (pa), qnd pyrocatecholate (pyr) (each M ) ; Cu(pyr)z is less than 0.4% a t pH
