Acid Catalysed Rearrangements in the Aryliminoindoline Series. Part 4. Reactions of 1,2-Dihydro-2-phenyl-2-(indol-3-yl-derivatives)-3-phenylimino-3H-indole with Trichloro acetic and Hydrochloric Acids. Crystal Structure of 1,2-Dihydro-2-phenyl-2-(indol-3-yl)-3-phenilimino-3H-indole