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- W1978263798 abstract "In the present paper, the d.c. polarographic behavior of cadmium(II) and lead(II) ions in ethylenediaminemonoacetate (EDMA) solutions was studied systematically. Since these metal(II) ions in an EDMA solution behave reversibly in a polarographic electrolysis, the compositions and the stability constants of cadmium(II)- and lead(II)-EDMA complexes could be estimated successfully from the shift of the half-wave potential of these metal(II) ions due to the complex formation with EDMA. The cadmium (II) ion was found to form complexes of 1-to-1 and 1-to-2 compositions with EDMA, and the electrode reaction mechanism was established to be: (Remark: Graphics omitted.) The successive formation constants of cadmium(II)-EDMA complexes, (K1)cdx and (K2)cdx were determined to be 3.01×108 and 5.65×104 respectively. On the other hand, the lead(II) ion forms only one complex with 1-to-l composition. In the presence of the chloride ion, the lead(II) ion was found to form a mixed ligand complex involving the chloride ion as well as a normal complex, PbX+, and the electrode reaction could be formulated as: (Remark: Graphics omitted.) The equilibrium constants, (K1)Pbx(=[PbX+]/([Pb2+]·[[X−])) and KpbxCl(=[PbXCl0]/([PbX+]·[Cl−])), were determined to be 1.69×108 and 1.01×10 respectively. The effect of the zinc(II) ion on the half-wave potential of the cadmium(II) ion in an EDMA solution was also studied. From the positive shift of the half-wave potential due to the presence of the zinc(II) ion, the formation constant of the zinc(II)-EDMA complex with a 1-to-1 composition was estimated to be 1.58×108." @default.
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- W1978263798 date "1970-02-01" @default.
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- W1978263798 title "Metal(II) Complexes of Ethylenediaminemonoacetic Acid (EDMA). Polarographic Studies of Cadmium(II) and Lead(II)-EDMA Complexes" @default.
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- W1978263798 doi "https://doi.org/10.1246/bcsj.43.409" @default.
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