Table 2. Comparison of the Reaction Yield and Turnover Number (TON) Calculated with Respect to the Formation of N-[(Xylylimino)methylene]aniline in the Catalyzed Azide–Isocyanide Coupling Reaction of the Representative Phenyl Azide and 2,6-Dimethylphenyl Isocyanide Substrates as Catalyzed by 4–7 and other Transition Metal Complexes Known in the Literature.