The kinetics of oxidation of 10-methyl-9-phenylacridan (1 (H)) and 9-deuterio-10-methyl-9- phenylacridan (1 (D)) to 10-methyl-9-phenylacridinium ion (3) by eight oxidants have been investigated. The oxidants included the π-acceptors 1, 4-benzoquinone (BQ), 7, 7, 8, 8- tetracyanoquinodimethane (TCNQ), p-bromanil (BA), p-chloranil (CA), tetracyanoethylene (TCNE), 2, 3-dicyano-1, 4-benzoquinone (DCBQ) and 2, 3-dichloro-5, 6-dicyano-1, 4- ...