Azo compound and tautomer thereof

摘要

An azo compound and tautomer thereof represented by the following formula (1) or the formula (2): wherein R¹, R², R⁵, R⁷, R⁸, R¹⁰, R¹¹, R¹⁴, R¹⁶, R¹⁷, R¹⁸, and R¹⁹ each independently represents a hydrogen atom, alkyl group, aryl group, alkoxy group, aryloxy group, alkylsulfonyl group, arylsulfonyl group, alkylthio group, arylthio group, cyano group, acyl group, carbamoyl group, amino group, nitro group, or halogen atom; R³, R⁴, R⁶, R⁹, R¹², R¹³, R¹⁵, and R²⁰ each independently represents a hydrogen atom, alkyl group, or aryl group; R¹ and R², R² and R³, R³ and R⁴, R⁶ and R⁷, R⁷ and R⁸, R⁸ and R⁹, R¹⁰ and R¹¹, R¹¹ and R¹², R¹² and R¹³, R¹⁵ and R¹⁶, R¹⁶ and R¹⁷, R¹⁷ and R¹⁸, R¹⁸ and R¹⁹, and R¹⁹ and R²⁰ may join to each other to form a ring structure, and A^- represents a counter anion.