N-alkyl acridones.

Basicity

Acridine and its homologues are weakly basic. Acridine is a photobase which has a ground state p''K''_a of 5.1, similar to that of pyridine, and an excited state pK_a of 10.6. It also shares properties with quinoline.

Reduction and oxidation

Acridines can be reduced to the 9,10-dihydroacridines, sometimes called leucoacridines. Reaction

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