{"title":"On the Reaction of Gold(III) Complexes with Methionine","authors":"V. Yu. Kharlamova, I. V. Mironov","doi":"10.1134/S0036023624602253","DOIUrl":null,"url":null,"abstract":"<p>The reactions of gold(III) complexes <span>\\({\\text{AuCl}}_{4}^{ - }\\)</span>, Au(bipy)Cl<span>\\(_{2}^{ + }\\)</span>, Au(en)<span>\\(_{2}^{{3 + }}\\)</span>, and Au(C<sub>9</sub>H<sub>19</sub>N<sub>4</sub>)<sup>2+</sup> with methionine (HMet) were studied in aqueous solutions (pH 2.0 and 7.4; <i>I</i> = 0.2 M (NaCl), <i>C</i><sub>Au</sub> = (5–10) × 10<sup>–5</sup> mol/L, <i>C</i><sub>HMet</sub> < (6–50) × 10<sup>–5</sup> mol/L) at 25°C. Methionine reduces gold(III) to gold(I), but the reactions proceed much more slowly (by hundreds of times) than under the action of thiols. The rate of reactions with HMet markedly decreases with increasing denticity of ligands in the gold(III) complex.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 10","pages":"1575 - 1579"},"PeriodicalIF":1.8000,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Inorganic Chemistry","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S0036023624602253","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
The reactions of gold(III) complexes \({\text{AuCl}}_{4}^{ - }\), Au(bipy)Cl\(_{2}^{ + }\), Au(en)\(_{2}^{{3 + }}\), and Au(C9H19N4)2+ with methionine (HMet) were studied in aqueous solutions (pH 2.0 and 7.4; I = 0.2 M (NaCl), CAu = (5–10) × 10–5 mol/L, CHMet < (6–50) × 10–5 mol/L) at 25°C. Methionine reduces gold(III) to gold(I), but the reactions proceed much more slowly (by hundreds of times) than under the action of thiols. The rate of reactions with HMet markedly decreases with increasing denticity of ligands in the gold(III) complex.
期刊介绍:
Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.