Redox properties, nickel macrocyclic complexes

Many new Ni(II) complexes of aza-type macrocycles have been synthesized, and their redox chemistries have been explored. In particular, complexes of macropolycyclic ligands and bismacrocyclic ligands have been prepared. Complexes with uncommon oxidation states of nickel (Nim and Ni1 complexes) have also been synthesized by employing a specially designed macrocycle, and their characteristic spectroscopic properties and X-ray structures reported. These nickel(II) complexes... 

An extensive study of the redox properties of tetraaza macrocyclic complexes of nickel has been performed by Busch and co-workers.3056,3133,3134 Electrochemical data for selected Nim/Nin couples are reported in Table 117. From an analysis of the EPR spectra it has been found that acetonitrile, as well as other molecules or ions like Cl and S04, can coordinate in axial position to give six-coordinate complexes.3056,3141 The g values are indicative of a dj... 

An extensive study of the redox properties of tetraaza macrocyclic complexes of nickel has been performed by Busch and co-workers. Electrochemical data for selected... 

In terms of its chemical properties, the isolated cofactor F43o resembles other nickel (II) complexes of tetraamine macrocycles with respect to redox and the binding of axial ligands. Me-Ni and RSNi derivatives of these macrocyclic complexes represent possible model intermediates for the C-S bond scission process [134]. 

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