Thermally Induced Oxidation of [Fe(tacn)](OTf) (tacn = 1,4,7-triazacyclononane).

We previously reported the spin-crossover (SC) properties of [Fe(tacn)](OTf) () (tacn = 1,4,7-triazacyclononane) [ , 2115]. Upon heating under dynamic vacuum, undergoes oxidation to generate a low spin iron(III) complex. The oxidation of the iron center was found to be facilitated by initial oxidation of the ligand via loss of an H atom.