Metalation of Expanded Porphyrins: A Chemical Trigger Used To Produce Molecular Twisting and Möbius Aromaticity

Round the twist: Metalation of [36]octaphyrin 1 provided the Möbius aromatic Pd2 complex 3 as well as the Hückel antiaromatic Pd2 complex 2. This method can be applied to other expanded porphyrins and Group 10 metal ions. The aromatic/antiaromatic character was supported by NMR spectrscopy, NICS calculation, and two-photon absorption measurements. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z704407_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.