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. Author manuscript; available in PMC: 2015 Apr 9.
Published in final edited form as: Chem Rev. 2014 Mar 3;114(7):3659–3853. doi: 10.1021/cr400327t

Figure 201.

Figure 201

Addition of dicyclohexylimidazole to {[(F8)Fe]-O2-[Cu(AN)]}+ results in a distinct species in which the imidazole coordinates the iron axially, and the geometry of the peroxide ligand bridges changes from “side-on” to “end-on”. The spin of the heme also changes from high-spin to low-spin upon coordination of the imidazole.