Nickel(II), copper(II) and zinc(II) complexes of 1,1,1-tris(aminomethyl)propane. A calculation procedure of stepwise formation constants and their standard errors from the Values Obtained for the Cumulative Equilibria
✍ Scribed by M. Michelon; A. Sabatini; A. Vacca
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 719 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0020-1693
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✦ Synopsis
The reactions of CH3CHSC(CHzNH2)3 (tamp) with H', Ni"', Cu2'and Zn2' have been investigated at 298 K in aqueous solution (OS M KNOB) using potentiometric techniques. The protonation constants have been determined and compared with those previously reported for similar triamines. The transition metal ions are able to form a large number of complexes with tamp, where the metal/ligand ratio is 1:l or 1:2. The stability constants of the complexes have been calculated using a modified version of the program MINIQUAD. The equilibrium constants pertaining to stepwise equilibria were obtained by combining the cumulative constants: the errors associated with the stepwise constants have been calculated taking into account the standard deviations of the constants, which have been combined, and their correlation coefficients.