Summary
The stepwise stability constants of 1:1 and 2:1 complexes of selenomethionine (SeMet) with CuII and ZnII ions have been determined in NaNO3 (0.1m) supporting electrolyte by potentiometric titration at 25 °C. The overall log stability constant (logβML2 = [ML2]/[M2+][L−1]2) for CuII and ZnII complexes are 14.50 and 8.75, respectively. Two new solids were prepared and identified by elemental microanalysis as (SeMet)2Cu and (SeMet)2Zn. I.r. and Raman spectral studies indicated metal coordination with the nitrogen and oxygen atoms of the amino acidato group of SeMet. The corresponding stretching bands were assigned at 341.1cm− for Cu-O, 352.9 cm− for Zn-O, 497.3 cm− for Cu-N and 475.2 cm− for Zn-N bonds.
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Zainal, H.A., Wolf, W.R. Potentiometric and spectroscopic study of selenomethionine complexes with copper(II) and zinc(II) ions. Transition Met Chem 20, 225–227 (1995). https://doi.org/10.1007/BF00143481
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DOI: https://doi.org/10.1007/BF00143481