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Updated: Jun 24, 2025

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
Published on: September 18, 2016
Observation of SOMO-HOMO Inversion in a Neutral Polycyclic Conjugated Hydrocarbon
Shantanu Mishra1, Manuel Vilas-Varela2, Shadi Fatayer3
1IBM Research Europe - Zurich, Rüschlikon 8803, Switzerland.
Abstract:
We report the generation of a nonbenzenoid polycyclic conjugated hydrocarbon, which consists of a biphenyl moiety substituted by indenyl units at the 4,4' positions, on ultrathin sodium chloride films by tip-induced chemistry. Single-molecule characterization by scanning tunneling and atomic force microscopy reveals an open-shell biradical ground state with a peculiar electronic configuration wherein the singly occupied molecular orbitals (SOMOs) are lower in energy than the highest occupied molecular orbital (HOMO).
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