The quest to understand the mechanism of redox reactions of u-oxo-bridged iron(III) dimer was the driving force behind the investigations contained in this book. Previous reports have indicated that such complex ion can be used as a model for metalloenzymes. Adequate knowledge on mechanisms of redox reactions of such dimeric ion would give an insight into the possible role of dimeric structures in the spin reduction of iron(III) haemoproteins and porphyrins since these biomolecules are known to contain Fe-O-Fe frame work. The book describes the redox reactions of u-oxo-bridged iron(III)...