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Spherical Sila- and Germa-Homoaromaticity

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journal contribution
posted on 17.12.2003, 00:00 by Zhongfang Chen, Andreas Hirsch, Shigeru Nagase, Walter Thiel, Paul von Ragué Schleyer
Guided by the 2(N + 1)2 electron-counting rule for spherical aromatic molecules, we have designed various spherical sila- and germa-homoaromatic systems rich in group 14 elements. Their aromaticity is revealed by density-functional computations of their structures and the nucleus-independent chemical shifts (NICS). Besides the formerly used endohedral inclusion strategy, spherical homoaromaticity is another way to stabilize silicon and germanium clusters.