10.1021/ja021159+.s001 Hui Cao Hui Cao Judith Flippen-Anderson Judith Flippen-Anderson James M. Cook James M. Cook The Synthesis of a Dicyclopenta[<i>a</i>,<i>e</i>]pentalene via a Molybdenum Hexacarbonyl-Mediated Tandem Allenic Pauson−Khand Reaction American Chemical Society 2003 tandem allenic 14π annulene Tandem approach Synthesi Molybdenum delocalization Dicyclopenta Pauson pentalene molybdenum dicyclopenta Allenic 2003-02-25 00:00:00 Dataset https://acs.figshare.com/articles/dataset/The_Synthesis_of_a_Dicyclopenta_i_a_i_i_e_i_pentalene_via_a_Molybdenum_Hexacarbonyl-Mediated_Tandem_Allenic_Pauson_Khand_Reaction/3641928 An approach to the 14π annulene has been developed, by employing the molybdenum hexacarbonyl-mediated tandem allenic Pauson−Khand reaction as a key step. A di-triisopropylsilyl substituted dicyclopenta[<i>a</i>,<i>e</i>]pentalene was synthesized. This 14π annulene showed some electronic delocalization, which was not observed in previous cases.