{(R,S (Fc),S (Fc))-2′′-Bromo-2-[1-(dimethyl­amino)­ethyl-κN]-1,1′′-biferrocene}trihydridoboron

The title structure, [Fe(2)(C(5)H(5))(2)(C(14)H(19)BBrN)], contains a chiral and asymmetrically 2,2′′-disubstituted biferrocene designed as precursor for enanti­oselective non-C (2)-symmetric biferrocenyldiphosphine catalysts. The mean bond lengths in the biferrocene unit are Fe—C = 2.048 (10) Å and C—C = 1.427 (8) Å within the cyclo­penta­dienyl rings. The B—N bond lengths of the BH(3) protected amine is 1.631 (3) Å. The inter­planar angle between the two connected cyclo­penta­dienyl rings is 54.29 (8)° and the corresponding Fe—Cg—Cg—Fe torsion angle is −52.5°. The conformation of the mol­ecule is stabilized by an intra­molecular C—H⋯Br inter­action.