Citation

Becker HD , Skelton BW White AH (1987) On the Origin of the Red Color of Aqueous-Solutions of 2,3-Dichloro-5,6-Dicyano-1,4-Benzoquinone (ddq). Crystal Structure of the Ammonium Salt of 2-Cyano-5,6-Dichloro-3-Hydroxy-1,4-Benzoquinone. Australian Journal of Chemistry 40, 625-629.

https://doi.org/10.1071/CH9870625