Acid Catalyzed Rearrangements in the Aryliminoindoline Series. Part III. Reactions of 2,3-Dihydro-2-aryl-2-indol-3-yl-3-phenylimino-1H-indole with Trichloroacetic Acid. Crystal Structures of 2-(p-Bromophenyl)-3,3-di-(1-methyl-2-phenylindol-3-yl)-3H-indole