Electron transfer between ascorbic acid and a (μ-oxo) diiron(III,III) complex: An example of chloride inhibition

The complex ion [Fe2III(μ-O)(phen)4(H2O)2]4+(1) and each of its H2O acid dissociated derivatives 1a and 2a react with one ascorbate ion in presence of excess phenanthroline in an inner sphere pathway to produce [Fe(phen)3]2+.