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Do All-Metal Antiaromatic Clusters Exist?

Chen, Zhongfang
Bohmann, Jon
Schleyer, Paul von Ragué
Published in Journal of the American Chemical Society. 2003, vol. 125, no. 46, p. 13930-13931
Abstract As shown by detailed nucleus-independent chemical shift (NICS) analyses of the contributions of each molecular orbital, the very recently reported gas-phase all-metal Al4Li3- anion and its relatives (Kuznetsov, A.E.; Birch, K.A.; Boldyrev, A.I.; Li, X.; Zhai, A.I.; Wang, L.S. Science 2003, 300, 622) are aromatic rather than antiaromatic. The paratropic (antiaromatic) four-π-electron contribution is overcome by the predominating diatropic effects of σ aromaticity. However, true antiaromatic all-metal clusters, such as Sn[6[2-]] (Schiemenz, B.; Huttner, G. Angew. Chem., Int. Ed. Engl. 1993, 32, 297), do exist.
Keywords AromaticityDelocalizationChemical shift
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Research group Groupe Weber
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CHEN, Zhongfang et al. Do All-Metal Antiaromatic Clusters Exist?. In: Journal of the American Chemical Society, 2003, vol. 125, n° 46, p. 13930-13931. doi: 10.1021/ja0361392 https://archive-ouverte.unige.ch/unige:3513

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Deposited on : 2009-10-02

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