Saturated polyaza macrocycles

Structural and thermodynamic properties of the complexes with saturated polyaza macrocycles 231... 

Structural awl thermodynamic properties of complexes with saturated polyaza macrocycles... 

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. 

The redox properties of the copper(II) ion in saturated polyaza macrocyclic complexes CuN4 and CuNj have been shown1020 to vary with the chelate ring size, and the very negative E° values (Figure 62) are consistent with a macrocyclic effect , from stability constant measurements.976... 

Wainwright, K.P. Synthetic and structural aspects of the chemistry of saturated polyaza macrocyclic ligands bearing pendant coordinating groups attached to nitrogen, Coord. Chem. Rev. 166 (1997), 35-90. 

By comparison, the chemistry of Os phthalocyanins (Pc) is less well developed, mainly because of their much lower solubility. Reaction of OsCls with o-cyanobenzamide in naphthalene at 290 °C followed by extended extraction affords [OsPc] . Reaction with ligands E affords the complexes [Os(Pc)(L)2] (L = py, pz, tz). Addition of one equivalent of L affords the polymers [Os(Pc)(E)] (E = pz, tz). Examples of Os complexes with saturated polyaza macrocycles have been reported. 

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