Saturated triaza macrocycles

Nickel(II) complexes with various saturated triaza macrocycles are six-coordinate in both the solid state and aqueous solution.2659,2663 In the bis complexes the ligands are facially coordinated (371) with normal Ni—N bond distances (about 210-214 pm). 1,2662... 

Mimics of carbonic anhydrase exemplify the genre further. Here, a simple saturated triaza-macrocycle replaces the histidine imidazole groups of the protein, yet the shape... 

A summary of nickel(H) complexes formed by representative saturated polyaza macrocycles is reported in Table 103, together with a concise description of the synthetic procedures and some of their physicochemical properties. Most studies are concerned with nickel(II) complexes with tetraaza macrocycles, but examples of complexes with triaza and pentaaza macrocycles are not rare. 

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