Abstract
Reaction of Cu2+ and Zn2+ with highly stable glutathionate gold(I) complexes in aqueous solution (T = 25°C, I = 0.2 M (NaCl)) has been studied, the reaction gives rise to formation of heterobinuclear complexes where glutathionate coordinates to gold(I) via deprotonated thiol group, while copper(II) or zinc(II) are bound to the glycinate fragments (GF) of glutathione. It has been shown that copper(II) in solution binds to two GF related to different glutathionate ions, while zinc(II) binds to one GF. In the pH region 6–9, for (AuGS)m\({\text{H}}_{m}^{{m-}}\)polymeric 1 : 1 complex, the most probable forms of heterobinuclear complexes are (AuGS)mCun\({\text{H}}_{{m\,\, - \,\,2n}}^{{m-}}\) and (AuGS)m(ZnOH)n\({\text{H}}_{{m\,\, - \,\,n}}^{{m-}}\) with variable number of M2+, where GS3– is deprotonated glutathione residue. The solutions remain homogeneous until \(C_{{\text{M}}}^{{2 + }}\) : CGS < 0.5. Formation of solid phases of complexes is observed at \(C_{{\text{M}}}^{{2 + }}\) : CGS > 0.5
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This work was supported by the Ministry Science and Higher Education of the Russian Federation, project no. 121031700315-2.
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Mironov, I.V., Kharlamova, V.Y. The Cu2+ and Zn2+ Heterobinuclear Complexes Based on Gold(I) Glutathionate Complexes in Aqueous Solution. Russ. J. Inorg. Chem. 67, 231–236 (2022). https://doi.org/10.1134/S0036023622020097
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DOI: https://doi.org/10.1134/S0036023622020097