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Urea-bridged diferrocene： structural, electrochemical, and spectroelectrochemical studies
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Urea-bridged diferrocene： structural, electrochemical, and spectroelectrochemical studies
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Journal Article
Urea-bridged diferrocene： structural, electrochemical, and spectroelectrochemical studies
2015
Overview
Urea-bridged diferrocene derivatives N,N＂-diferrocenylurea（1） and N,N＂-dimethyl-N,N＂-diferrocenylurea（2） were prepared and characterized. Single-crystal X-ray analysis shows that Compound 1 has a trans-trans linear conformation whereas Compound 2 has a trans-cis conformation. Both compounds display two consecutive redox couples with, respectively, E1/2 of ＋0.29 and ＋0.42 V vs. Ag/Ag Cl for 1 and ＋0.31 and ＋0.50 V for 2. Spectroelectrochemical studies show the presence of distinct intervalence charge transfer（IVCT） transitions for the one-electron-oxidized mixed-valent Compound 1＋, with an estimated electronic coupling parameter of 190 cm^-1. By contrast, the one-electron-oxidized Compound 2＋ shows much weaker IVCT transitions.
