MESOIONIC COMPOUNDS WITH BRIDGING NITROGEN ATOMS. 14. POLYMETHINE DYES CONTAINING A THIOZOLOTRIAZINIUM OXIDE NUCLEUS

Article abstract of DOI:10.1007/BF00475611

Monomethinecyanine and zeromethinemerocyanine dyes have been synthesized on the basis of mesoionic 6-methylthiothiazolo<3,4-b><1,2,4>triazinium-2-oxides.It was found that these newly synthesized compounds can exist both in mesoionic form and in salt form.