Boat-to-Boat Conformation Inversions of Cyclobis[7,8-(para-quinodimethane)-3,7-(9-(p-tolyl)-9H-carbazole)] in Neutral and Tetracationic State

Abstract

We report the synthesis of macrocyclic cyclobis[7,8-(para-quinodimethane)-3,7-(9-(p-tolyl)-9H-carbazole)] CBQCz. We found CBQCz showed temperature-dependent and four-electron oxidative conformation changes. Both CBQCz and CBQCz4+ possesses boat-to-boat conformation inversions. Smaller inverted energy and less curved structure of CBQCz4+ are due to the conjugated effect of tetracations.