Lewis acidity enhancement of organoboranes via oxidation of appended ferrocene moieties

摘要

The Lewis acidity of boron in diboradiferrocene 1 is strongly enhanced through oxidation of the iron atoms as evident from examination of X-ray structural parameters of the mixed-valent cation 1~+PF_6 and further confirmed from the strong complexation of MeCN to the dication in 2~(2+)(I_3)_2.