Abstract: The twofold reduction of dibenzotetracene (1) to its corresponding dianion was performed with lithium and sodium metals. The resultant doubly charged species revealed unusual 'H NMR patterns which indicate the existence of a partitioning of the MO's framework of 12-into two parts:“anthracene”-like and “phenanthrene” 4ke systems, each system exhibiting independent characteristic features, similar to those observed in ...
