Titration of [Fe(To-F2PP)(NO)] (1-F) with 1-methylimidazole (MI)
in toluene solution at room temperature monitored by UV-Vis absorption spectroscopy. The Soret band of
1-F at 403 nm disappears while the Soret band of the product [Fe(To-F2PP)(MI)(NO)]
(2-F) appears at 425 nm.