Flash Communication: Synthesis and Characterization of a 9,10-Distiba-Dewar-anthracene

A 9,10-distiba-Dewar-anthracene bearing bulky substituents was obtained by the reduction of the corresponding 5,10-dichloro-5,10-dihydrostibanthrene. Molecular structures of the 9,10-distiba-Dewar-anthracene and 5,10-dichloro-5,10-dihydrostibanthrene have been definitively revealed by single-crystal X-ray crystallographic analyses and discussed based on theoretical calculations. Computational studies suggest that 9,10-distiba-Dewar-anthracene is thermodynamically favorable relative to the corresponding 9,10-distibaanthracene derivative.