Synthesis and properties of dipyridemium betaines of derivatives of 1,4-benzoquinone and tetracyanoquinodimethane

Article abstract of DOI:10.1007/BF02290722

Reaction of chloranil with excess pyridine gives the poorly stable 2,5-di(N-pyridinium)-3,6-dichloro-1,4-benzoquinone dichloride which is readily hydrolyzed to give the bisbetaine of 2,5-di(N-pyridinium)-1,4-benzoquinone-3,6-dioxide. Treatment with acid g