351444-74-1Relevant academic research and scientific papers
Synthesis of the diborylated ferrocene 1,1′-bis-(bis-pentafluorophenylboryl)ferrocene and the X-ray structure of its trimethylphosphine adduct
Carpenter,Piers,McDonald
, p. 291 - 295 (2007/10/03)
The diborylated ferrocene compound 1,1′-Fc[B(C6F5)2]2 (2) was prepared via a transmetallation reaction involving 1,1′-Fc(HgCl)2 and two equivalents of ClB(C6F5)2. Although this reaction is very clean spectroscopically, isolated yields of 2 were never greater than 40% owing to the high solubility of the compound in non-donor solvents. Compound 2 is similar in its properties to the related monoborylated complex FcB(C6F5)2 (1) reported previously, particularly the UV-vis spectrum, which exhibits an intense charge transfer absorption (λmax = 233 nm, ε = 1.64 × 104) assignable to an Fedz2/dx2-y2 → Bp transition. However, 2, is significantly more Lewis acidic than 1, reacting with weak donors such as acetonitrile at room temperature, and effecting methide abstraction from Cp2ZrMe2 under mild conditions. Complex 2 also forms a bis(trimethylphosphine) adduct (3), which was structurally characterized via X-ray crystallography.
