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All-metal aromatic cationic palladium triangles can mimic aromatic donor ligands with Lewis acidic cations
Chemical Science ( IF 8.4 ) Pub Date : 2017-08-29 00:00:00 , DOI: 10.1039/c7sc03475j
Yanlan Wang 1, 2, 3 , Anna Monfredini 4, 5, 6, 7 , Pierre-Alexandre Deyris 1, 2, 3 , Florent Blanchard 1, 2, 3 , Etienne Derat 3, 8, 9, 10 , Giovanni Maestri 1, 2, 3, 4, 5 , Max Malacria 1, 2, 3, 8, 9
Affiliation  

We present that cationic rings can act as donor ligands thanks to suitably delocalized metal–metal bonds. This could grant parent complexes with the peculiar properties of aromatic rings that are crafted with main group elements. We assembled Pd nuclei into equilateral mono-cationic triangles with unhindered faces. Like their main group element counterparts and despite their positive charge, these noble-metal rings form stable bonding interactions with other cations, such as positively charged silver atoms, to deliver the corresponding tetranuclear dicationic complexes. Through a mix of modeling and experimental techniques we propose that this bonding mode is an original coordination-like one rather than a 4-centre–2-electron bond, which have already been observed in three dimensional aromatics. The present results thus pave the way for the use of suitable metal rings as ligands.

中文翻译:

全金属芳族阳离子钯三角形可以模拟具有路易斯酸性阳离子的芳族供体配体

我们提出由于适当地离域的金属-金属键,阳离子环可以充当供体配体。这可以使母体配合物具有用主族元素精制的芳香环的特殊性能。我们将Pd原子核组装成具有无阻碍面的等边单阳离子三角形。像它们的主族元素对应物一样,尽管它们带正电荷,但这些贵金属环仍与其他阳离子(例如带正电的银原子)形成稳定的键合相互作用,以提供相应的四核双金属配合物。通过建模和实验技术的混合,我们认为这种键合模式是一种原始的配位形式,而不是4中心2电子键,这在三维芳香族化合物中已经观察到。
更新日期:2017-09-14
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