Dispersion‐Driven Conformational Isomerism in σ‐Bonded Dimers of Larger Acenes

Abstract

The σ-bonded butterfly structure of the nonacene dimer shows unusual dispersion-driven conformational isomerism that is due to strong intramolecular dispersion interactions between the wings of annulated aromatic rings. High-level LPNO-CEPA and DFT-D3 ab initio calculations are in good mutual agreement, whereas dispersion-devoid DFT and the MP2 method completely fail. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. 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.