1:1 Adduct of 1,1‘-Bis(dibromoboryl)ferrocene and 3,3‘,4,4‘-Tetramethyl-1,1‘-diphosphaferrocene

The Lewis acid−base adduct between 1,1‘-bis(dibromoboryl)ferrocene and 3,3‘,4,4‘-tetramethyl-1,1‘-diphosphaferrocene has been characterized by multinuclear variable-temperature NMR spectroscopy and single-crystal X-ray diffraction analysis. Irrespective of the
crystallization conditions applied, the molecular structure of the adduct is that of an open-chain dinuclear
complex featuring only one P−B bond.