S1 Supporting Information Twisted polycyclic arenes by intramolecular Scholl reactions of C3-symmetric precursors Anirban Pradhan, Pierre Dechambenoit, Harald Bock, and Fabien Durola* Centre de Recherche Paul Pascal, CNRS & Univ. Bordeaux, 115 avenue Schweitzer, 33600 Pessac, France durola@crpp-bordeaux.cnrs.fr S2 Instrumentation Chromatographic supports X-ray diffraction techniques S8 NMR spectra S46 Mass spectrum of the 30 + 31 complex