Copper- i and- n Complexes

The oxidation of the bis-copper(i) complex [Cu(terpy)2] in acetonitrile proceeds 

The ka rate term may refer to either a ring-opening followed by co-ordination of the oxygen or to an electron transfer via the i-electron system of the ligand. Similar 

A low-oxidation state peroxide has been characterized in the reaction of copper(i) chloride in pyridine,  

The species which is formally copper(i) is evidently strongly stabilized by electron delocalization. No solid sample was isolable so that the number of pyridine molecules associated with the metal centre is not known. The spectrum of the complex shows no maximum in the range 305—800 nm and is similar to that observed for the proposed peroxide grouping in oxyhaemocyanin.  

The kinetics and mechanism of the copper(ii)-catalysed oxidation of ascorbic acid H2A by dissolved oxygen have been re-investigated. In nitrate media ovct the pH range 2.0—3.5, the rate law is represented as 

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