The four diones derived from benzo [a] pyrene oxidation have been characterized by high- field nuclear magnetic resonance techniques including 2-D COSY and selective nuclear Overhauser enhancement. All the proton chemical shifts for these four quinones have been uneqivocally assigned. The direct photoxidation of benzo [a] pyrene gives a product distribution very similar to the TPP photosensitized oxygenation, suggesting singlet ...
![Benzo[a]pyrene-1,6-dione Structure](https://image.chemsrc.com/caspic/252/3067-13-8.png)
