Potentiometric determination of stepwise stability constants of zirconium and thorium chelates formed with aspartic and glutamic acids.
The metal chelates of Zr(IV) and Th(IV) with aspartic and glutamic acids have been studied potentiometrically. Stepwise stability constants in 0.1 M sodium perchlorate at 25 degrees are reported as: aspartate chelates-log K(1) 9.70, log K(2) 6.85, and log K(3) 3.50 for Zr, and log k(1) 9.23, log K(2) 8.57, log K(3) 4.55 and log K(4) 3.87 for Th; glutamate chelates-log K(1) 9.60, log K(2) 6.40 and log K(3) 3.32 for Zr and log K(1) 9.11, log K(2) 8.52, log K(3) 4.18 and log K(4) 3.62 for Th.
Singh
M K
MK
Chemical Laboratories University of Allahabad AllahabadIndia.
Srivastava
M N
MN