Réant Benjamin L L, Berryman Victoria E J, Seed John A, Basford Annabel R, Formanuik Alasdair, Wooles Ashley J, Kaltsoyannis Nikolas, Liddle Stephen T, Mills David P
Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
Chem Commun (Camb). 2020 Oct 20;56(83):12620-12623. doi: 10.1039/d0cc06044e.
We report the synthesis and characterisation of isostructural thorium(iv)- and uranium(iv)-silanide actinide (An) complexes, providing an opportunity to directly compare Th-Si and U-Si chemical bonds. Quantum chemical calculations show significant and surprisingly similar An%:Si%, 7s-, 6d-, and 5f-orbital contributions from both elements in polarised covalent An-Si bonds, and marginally greater covalency in the U-Si vs. Th-Si linkages.
我们报告了同结构的钍（IV）-和铀（IV）-硅化物锕系元素（An）配合物的合成与表征，这为直接比较钍-硅和铀-硅化学键提供了契机。量子化学计算表明，在极化共价An-Si键中，两种元素的An%:Si%、7s-、6d-和5f-轨道贡献显著且惊人地相似，并且铀-硅键的共价性略大于钍-硅键。
