@article{Chen2022, 
author = {Wei-Xing Chen and Nikolay V. Tkachenko and Alvaro Muñoz-Castro and Alexander I. Boldyrev and Zhong-Ming Sun},
title = {Ruthenium-mediated assembly and enhanced stability of heterometallic polystannides [Ru2Sn19]4− and [Ru2Sn20]6−},
year = {2022},
journal = {Nano Research},
volume = {15},
number = {6},
pages = {5705-5711},
keywords = {ruthenium, aromaticity, heterometallic clusters, polystannide, Zintl anion},
url = {https://www.sciopen.com/article/10.1007/s12274-022-4178-9},
doi = {10.1007/s12274-022-4178-9},
abstract = {In this work, we report the synthesis and characterization of two novel Ru-containing Zintl clusters: [Sn19{Ru(COD)(en)}2]4− and [Sn20{Ru(COD)}2]6−. The synthesized compounds not only expand the family of Ru-Sn cluster systems but also shed light on the structure of heterometallic complexes in a previously unknown range of tin atoms. The single-crystal X-ray diffraction (XRD) analysis reveals the dimeric nature of the clusters. Two different assembly patterns of the formal [Sn(η3-Sn9)] monomer were observed: the dimerization through the vertex fusion process and the direct dimerization through the formation of 2c–2e Sn–Sn σ-bond. For both clusters, the density functional theory calculations reveal the locally σ-aromatic nature of the [Sn(η3-Sn9)] monomer resulting in two independent magnetic shielding cones. We believe that our findings will help the community to further explore the fascinating chemistry of polystannide clusters.}
}