Department of Spectroscopy and Catalysis, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525AJ, Nijmegen (The, Netherlands.
Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo náměstí. 2, 16610, Prague, Czech Republic.
Chemistry. 2022 Oct 26;28(60):e202201794. doi: 10.1002/chem.202201794. Epub 2022 Sep 1.
Gold(II) complexes are rare, and their application to the catalysis of chemical transformations is underexplored. The reason is their easy oxidation or reduction to more stable gold(III) or gold(I) complexes, respectively. We explored the thermodynamics of the formation of [Au (L)(X)] complexes (L=ligand, X=halogen) from the corresponding gold(III) precursors and investigated their stability and spectral properties in the IR and visible range in the gas phase. The results show that the best ancillary ligands L for stabilizing gaseous [Au (L)(X)] complexes are bidentate and tridentate ligands with nitrogen donor atoms. The electronic structure and spectral properties of the investigated gold(II) complexes were correlated with quantum chemical calculations. The results show that the molecular and electronic structure of the gold(II) complexes as well as their spectroscopic properties are very similar to those of analogous stable copper(II) complexes.
金（II）配合物较为罕见，其在化学转化催化中的应用也尚未得到充分探索。原因在于它们很容易被氧化或还原为更稳定的金（III）或金（I）配合物。我们研究了从相应的金（III）前体形成[Au（L）（X）]配合物（L=配体，X=卤素）的热力学，并在气相中研究了它们在红外和可见光谱范围内的稳定性和光谱性质。结果表明，稳定气态[Au（L）（X）]配合物的最佳辅助配体 L 是具有氮供体原子的双齿和三齿配体。所研究的金（II）配合物的电子结构和光谱性质与量子化学计算相关联。结果表明，金（II）配合物的分子和电子结构及其光谱性质与类似的稳定铜（II）配合物非常相似。
