Having gained chemical understanding at molecular level, Safety of 1,1′-Diacetylferrocene, chemistry graduates may choose to apply this knowledge in almost unlimited ways, as it can be used to analyze all matter and therefore our entire environment. In a patent，Which mentioned a new discovery about 1273-94-5
A series of 1,1?-ferrocenyldiimines [Fe{(eta5-C5H4)-C(Me)N-R}2 ], where R = n-hexyl 1a, cyclohexyl 1b, phenyl 1c, 4-methoxyphenyl 1d, 3-methoxyphenyl 1e, 4-nitrophenyl 1f, and 3-nitrophenyl 1g, have been synthesized by reactions of ca. 1:2 M ratio of 1,1?-diacetylferrocene and the corresponding amines. While ca. 1:1 M ratio of the starting materials was employed, acetylferrocenylimines [Fe{(eta5-C5H4)-C(CH3){dou ble bond, long}O}{(eta5-C5H4)-C(CH3) {double bond, long}N-R}], where R = 4-nitrophenyl 2f, and 3-nitrophenyl 2g, were obtained. Single crystal X-ray structural analysis revealed that the two cyclopentadienyl rings in 1d, 1e, 1g, 2f, and 2g were antiperiplanar staggered, anticlinal eclipsed, anticlinal eclipsed/synclinal eclipsed, synclinal eclipsed, and synclinal eclipsed to each other in solid state, respectively. All synthesized ferrocene derivatives exhibited a reversible one-electron redox process in their cyclic voltammograms, and the values of their redox potentials relied on the R groups. The correlation between the redox potential and the Hammett substituent constant, sigmap was quite well, with a correlation coefficient of 0.98. The UV-vis spectra showed that their optical property was also substituent dependent.
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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion