Mixed-ligand complexes structural variation

The great structural variability of polypyridine complexes enable us to tune and control their redox properties over a very broad range. For example, variations in polypyridine ligand structure can shift the reduction or oxidation potential within a range almost 2 V wide. Further control can be achieved by changing the nature of the metal and, in mixed-ligand complexes, of ancillary ligands. Polypyridine com-... 

Thus, the rate of polymerization is internally first order in monomer, externally first order with respect to initiator and activator, Cu(I), and negative first order with respect to deactivator, XCu However, the kinetics may be more complex because of the formation of XCu species via the persistent radical effect. The actual kinetics depend on many factors, including the solubility of activator and deactivator, their possible interactions, and variations of their structures and reactivities with concentrations and composition of the reaction medium. It should also be noted that the contribution of persistent radical effect at the initial stages might be affected by the mixing method, solubility of the metal compoimd and ligand, etc (239-242). 

Influence of single and mixed solvents on the rate of electrode reactions, electrochemical properties of organic redox couples and the complex formation of metal ions by macrocyclic ligands were studied. In addition, variation of the stability constants of complexes with solvent composition and modeling of probable structures of coordination compounds by computer simulation were investigated. 

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