The synthesis of triangulene (I) was attempted to ascertain whether the hydrocarbon was rendered more stable, than is implied by the diradical formula (I), by a molecular orbital structure with trigonal symmetry. The formula (I) expresses in classical terms that triangulene has no KekulC structure. Triangulenequinone (XI) was synthesized by two methods and its reduction was studied in detail. The results show that triangulene compounds derived ...
![4h,8h-dibenzo[cd,mn]pyrene-4,8-dione结构式](https://image.chemsrc.com/caspic/428/65171-43-9.png)