Synthesis of Armchair and Chiral Carbon Nanobelts

？ The largest armchair carbon nanobelt so far and the first chiral carbon nanobelt ？ The first synthesis of carbon nanobelts by π-expansion of carbon nanorings ？ Formation of 12 carbon-carbon bonds in one step in a yield as high as 66% ？ Theoretical calculations of strain energies shedding light on synthetic strategie