CHEMISTRY Syntheses of Asymmetric Dehydrobenzoannulenes. Virgina Perleberg-Nobbe, Wil Talbert, Bobby Joe Wherle, Brittany Cramer, Andrew Price, Katie Sullivan, Kaitlin Cahill, Stephen Hendricks and KC Russell. Department of Chemistry, Northern Kentucky University, Highland Heights, KY 41099. Dehydrobenzonnulenes (DBAs) are completely conjugated cyclic compounds made from aromatic linked by triple bonds. DBAs incorporating aromatic rings often possess spectroscopic properties that make them ideal candidates for the development of environmental sensor technologies. Placement of electron donor and electron withdrawing groups on the periphery of an annulene results in a push-pull system which affects its spectroscopic properties. The Russell Research Group has previously reported the synthesis of a series of symmetric annulenes. The focus of this research is to synthesize a series of asymmetric DBAs, giving new isomers lacking symmetry with respect to the electron donating oxygen and the electron withdrawing nitrogen atoms. Thus far, three of the four dimmers and one of the four trimers necessary to make the four isomeric, asymmetric annulenes have been synthesized.