Möbius bis and tris-spiroaromatic systems.


We propose that a general class of bis and tris-spiro 7-membered ring systems with a common atom X, of which there are a number of examples characterised crystallographically, can in fact be considered as spiroaromatic molecules in which each ring exhibits some degree of Möbius 4n pi-electron aromaticity. The aromaticity is probed as a function of the spiro… (More)


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