Abstract
The structural, bonding, and superhalogen properties of Au4X −/04 (X = F, Cl, Br, and I) clusters were investigated by density functional theory calculations. Our results found that Au4F4−, Au4Cl4−, and Au4Br −4 have similar cyclic arrangements, spectral, and superhalogen features, and Au4I4− has a D4h symmetric planar ring-like structure, while Au4X4 neutrals all adopt a D2d symmetric quasi-planar eight-membered ring. Bond lengths, Wiberg bond orders, molecular orbital, ELF, and PDOS analyses suggest that the Au–I and Au–Au bonding in Au4X −/04 are weak involving both covalent and ionic contributions. The nucleus-independent chemical shift, aromatic stabilization energy, and multicenter bond index calculations suggest that Au4I4− has significant aromaticity.
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Acknowledgements
This work was supported by the Natural Science Foundation of Shandong Province, China (Grant No. ZR2018BB040), Open Funds of Beijing National Laboratory for Molecular Sciences (Grant No. BNLMS201804), and research start-up funds (Doctoral Science Foundation, Grant No. XY18BS02) of Heze University.
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Lu, SJ., Wu, LS. & Lin, F. Structural, bonding, and superhalogen properties of Au4X −/04 (X = F, Cl, Br, and I) clusters. Theor Chem Acc 138, 51 (2019). https://doi.org/10.1007/s00214-019-2442-1
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DOI: https://doi.org/10.1007/s00214-019-2442-1